do did were didn't和to都用在哪些时态里

do 用在现在时
did是do的过去时，所以用在一般过去时里
didn't是did的否定式，所以用在一般过去式的否定句里
were是are的过去式，用在一般过去式和过去进行时
to不是动词啊，你是说to do吧。to do跟在动词后面，比如want to do
还有to do表将来，用在一般将来时，比如i'm to go to the zoo

do现在时 `表强调时
did`过去时 `虚拟语气（it's high time that sb did sth)
didn't 过去时
were过去时` 虚拟语气中 `
to 表将来 不定式做宾语 宾补..还一些单词后 固定搭配吧 such as ：want to do
prefer to do