The second question:

The third question:

This part of the extended material mainly examines the knowledge points of tense voice:

It is necessary to use different verb forms to express actions or existing states at different times. In English grammar, "time" refers to the time when the action takes place, and "state" refers to the appearance and state of the action.

Verb form used to explain the relationship between subject and predicate. Voice is a form of verb, which is used to explain the relationship between subject and predicate verb. English voice can be divided into active voice and passive voice.

The act or state of occurring frequently or repeatedly "now". Often used with adverbials of time, such as often, always, naturally, sometimes, every day, once a week, etc.

Action verbs are used with always, forever and so on. Expressing repetitive actions may make people feel bored or unreasonable, and sometimes it also expresses appreciation and satisfaction.