Complete the following sentences using the correct form of do.
Use does when the subject is a singular noun or a third person singular pronoun (e.g. he, she, it).
Use do when the subject is a plural noun or a plural pronoun. (e.g. they, we). The first person singular pronoun I also takes do.
Use did in the past tense. It is easy to decide whether a sentence is in the past tense. You just need to look for past time adverbs. For example, if you find words/phrases like yesterday or last year, it is safe to assume that the given sentence is in the past tense.