1, the Be verb is (am, are, is) ... If there are no verbs such as "write, buy" in the sentence, add the Be verb directly after the subject.

2, and if there is a notional verb in the sentence, then if you want to change it into a general question, you should use do (also called an auxiliary verb), such as: I study. Change the general question: Do you study?

Second, the complexity is different.

1. Besides the original be, different personal pronouns, singular nouns and plural nouns have various forms and abbreviations. To sum up, there are seven forms: be, am, is, are, was, was, bee, being.

Their collocations with personal pronouns, noun lists and plural numbers are as follows: I am, you are, he/she/it/yes, we/you/they are in the present tense; Is is used for singular nouns and uncountable nouns, and for plural nouns.

Abbreviations I am, you are, he is, we are, you are, and they are.

Negative abbreviation I'm not, not, not.

Past tense I am, you are, he/she/it/yes, we/you/they are; Singular nouns and uncountable nouns are used as was, and plural nouns are used as was.

The negative abbreviation is t, were t

Past participle been

Present participle being

2. Besides be, do, does, did, will, sha 1l, have, hαs and hαd can also be used as auxiliary verbs to form various tenses. Do and does are auxiliary verbs in the simple present tense.

To form negative sentences and interrogative sentences, affirmative sentences are not needed. At this time, do and does have no meaning, so don't translate! Did is an auxiliary verb in the past tense, which constitutes negative sentences and interrogative sentences, and affirmative sentences are not needed. At this time, did has no meaning, no translation!

Third, the roles are different.

1. In a sentence, be has two main functions: first, as a connecting verb, it can act as a predicate verb; Secondly, as an auxiliary verb, it forms various tenses and passive voices together with the predicate verb.

2.do is used to change the general tense and past tense of action verbs.