1. The subjunctive mood in the subject clause mainly relies on some adjectives and past participles to express suggestions, orders, demands, surprises and disappointments. Its form is: (should)+ verb prototype.

Adjectives commonly used in this way are:

Appropriate and desirable, appropriate and reasonable, better and desirable, ideal, essential, urgent, important, persistent, natural, necessary, better, strange, urgent and extremely important.

The past participle is:

Expected, required, ordered, requested, suggested, recommended, required, etc.

For example:

It is important to win the hearts of voters. It is absolutely necessary to win the hearts of voters.

He was suggested to take part in club activities. It is suggested that he should take part in club activities.

2. The subjunctive mood in predicative clauses and appositive clauses requires them to use subjunctive mood after nouns such as suggestions, orders, opinions, goals and wishes. Its form is: (should)+ verb prototype.

The nouns commonly used in this way are:

Make up your mind; Make up your mind; Request for a ruling; Put forward a motion; Make suggestions; Suggested preference; Make suggestions; Consultation and recommendation; Desire to recommend; Demand; Demand; Order; Command; Necessity; Requirements; Ideas; Ideas; For example:

He ordered a warm reception for the guests. He asked for a warm reception for these guests.

His suggestion is that we should get rid of bad habits. He suggested that we should give up these bad habits.

3. subjunctive mood in the object clause

1) The predicate verb in the object clause is followed by some verbs that need subjunctive mood to express suggestions, orders and demands. Its form is: (should)+ verb prototype. Verbs commonly used in this way are:

Ask for advice, decide, decide, decide, command, insist on moving advice, prefer proposal, command, recommend request, advise, urge request, direct command, for example:

He insisted that the meeting should be postponed. He asked to postpone the meeting.

They suggested that all the plans should be discussed at the meeting. They suggested that all the plans should be discussed at the meeting.

2) subjunctive mood can also be used in compound object clauses with it as formal object, and its form is: (should)+ verb prototype. The adjectives used in this sentence pattern (object complement) are the same as those used in subjunctive mood in the subject clause. For example:

We think it wise for him to think twice before acting. We think it wise for him to think twice before acting.

3) The subjunctive mood followed by wish in the object clause indicates unfulfilled wishes.

There are three main forms:

Represents the virtuality of the present situation: wish+ subject+verb past tense or were represents the virtuality of the past situation: wish+ subject +had+ past participle represents the virtuality of the future situation: wish+ subject +would+ verb prototype.

For example:

I wish I knew what was going to happen.

She wants her to stay at home. She regrets staying at home

I wish I were rich. I wish I were rich.

Note: When expressing the past virtuality, sometimes the following forms can be adopted:

I wish I could have seen her last night. If only I could see her last night.

4. The subjunctive mood form in the if conditional sentence1) The hypothesis expressed in the if unreal conditional sentence is impossible or impossible to happen or realize, and the subjunctive mood is used in both the main sentence and the clause.

In if unreal subjunctive conditional sentences, the predicate verbs of the main clause and clause mainly have the following forms:

Hypothetical conditional clause predicate verb form main sentence predicate verb form is contrary to the present fact (should, could, may verb prototype is contrary to the past fact Had+ past participle were) should (should, could, may)+have+ past participle may be contrary to the future fact verb past tense (should+ verb prototype, were to+).

Without gravity, we can't walk. Without gravity, we can't walk.

If no one told me, I would never know what these things are for.

2) In formal style, sometimes the conjunctions if in subjunctive conditional sentences can be omitted, and auxiliary verbs such as was, had had and should (excluding behavioral verbs) can be placed in front of the subject. If there is no were, had or should in the sentence, you can neither omit if nor invert it. For example:

If I see him tomorrow, I will ask him about it. If I see him tomorrow, I will ask him about it.

If I had had money last year, I would have bought this house. If I had money last year, I would have bought that house.

If something goes wrong with the boiler, the automatic control device will cut off the fuel supply. If there is something wrong with the boiler, the automatic control device will automatically cut off the fuel supply.

3) Usually, in untrue conditional sentences, the predicate verbs of the main sentence and the clause refer to the same time, but sometimes they may refer to different times, so different predicate verb forms should be adopted according to the meaning of the context. For example:

If I were you, I would take his advice. If I were you, I would take his advice. (The clause refers to the present and the main clause refers to the past)

If the weather is better, the crops will grow better. If the climate is more suitable, the crops will grow better. (The clause refers to the past and the main clause refers to the present)

5. Implicit virtual conditional sentence 1) Sometimes the hypothetical situation is not expressed in the form of conditional clauses, but through a prepositional phrase or other means. Commonly used words or phrases are: without, but for, but that, otherwise, or, but and so on. For example:

Without your help, we could not have succeeded. Without your help, we wouldn't have succeeded.

Without electricity, there would be no modern industry. Without electricity, there would be no modern industry.

He is in a meeting; Otherwise he will come and help us. He is discussing with his students, otherwise he will come to help us.

He felt very tired yesterday, otherwise he would have attended the party. He was very tired yesterday, otherwise he would have attended the party.

2) In some simple sentences with subjunctive conditions, subjunctive mood can be expressed through context. The form of the predicate verb is should/ would be, and the virtual form is should/would have be. For example:

Anyone in his position would do that. Anyone in his position would do that.

You should have come earlier. You should have come earlier.

6. subjunctive mood in other sentence patterns 1) In the clauses followed by will but, would night, would just as only, might as well and would preferred, subjunctive mood can also be used to express wishes, meaning "I would rather, I hope". Its form is:

① "①" would rather (rather earlier …)+past tense of subject+predicate verb "indicates the present or future situation.

② "I would rather (rather earlier)+subject+verb past perfect tense" indicates the past situation. If he doesn't leave now, I'll feel as if you were here yesterday.

2) The sentence pattern "It is (high/about) time ..." can also be followed by subjunctive mood, and the past tense is often used in clauses. Sometimes "(should)+verb prototype" is used, which means "it's time for ...". For example:

It is time for the boy to go to school. It is time for the child to go to school.

The weather should have improved a long time ago. The weather will really get better.

3) In the exclamatory sentences caused by "if", subjunctive mood is also needed to express wishes.

The forms are as follows: ① Past tense or "would/could+ verb prototype" indicates a wish contrary to the present or future facts.

(2) The past perfect tense indicates a wish contrary to the past facts. For example:

If only you could listen to our suggestions. If only you could listen to our suggestions.

If only I had not been busy last week! If only I had not been busy last week!

If only she could marry me. I hope she can marry me.

Note: if only can also be used in virtual conditional sentences. For example:

If I had more money, I could buy a car. If I had more money, I could buy a car.

4) The conjunction "in case, lest, afraid" can be used to guide the subjunctive mood. Its form is usually: "... ……lest (in case, afraid of that)+subject +should+ verb prototype". The should in the "lest, lest" sentence can be omitted, and the should in the "in case" sentence is usually not omitted, but the subjunctive mood can be used in the "in case" sentence. Lest, for fear that other forms will follow. For example:

He took his coat in case it rained. He took a raincoat in case it rained.

I won't make any noise so as not to disturb you. I'll keep quiet so as not to disturb you.

Care must be taken when using this method to avoid overflow. Be careful when using this method to avoid overflow.

References:

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