When to use do / does and when to use the verb be?

When to use do / does and when to use the verb be?

In the original sentence, if there are only notional verbs, use do or does, modal verbs or be verbs to advance them to the beginning of the sentence, such as a: she_ likes_ Cat because she and he are the third person singular, and there is no modal verb such as can / may / should in the sentence, so it becomes a general question: does_ she_ like_ Cat? Because the personal singular has been embodied in the auxiliary verb does, like can be used in its original form_ can_ sing_ some_ English_ It's OK to put can ahead of time