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The second question:

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The third question:

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This part of the extended materials mainly examines the knowledge points of verb tenses:

Words used to describe or express various actions. Basically, every complete sentence has a verb. To express the second action, you can use infinitive, gerund, equivalent connectives, subordinate connectives or add clauses. In English, verbs are divided into many tenses according to time and action type.

Tenses and forms of English verbs. Tenses include present, past, future and past future tense; Have a general, complete, progressive and complete body shape. There are two kinds of sounds, active and passive.

Tenses consist of "time" and "state". "Time" has four main parts, namely present, past, future and past future; There are also four kinds of "states", namely, general, progress, completion and completion. The combination of four degrees and four states is that tense, *** 16.