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do 第…..個做某事 例句:Who is the first to get there?★ 我不知/忘記了怎么辦。I didn39。t know/forgot what to do.以下是不帶to的動詞不定式(即動詞原形)的常見用法★ let sb. do sth讓某人做某事 ★ make do sth使得某人做某事 ★ hear sth do sth聽見某人做某事 ★see sb. do sth do sth看見某人做某事★ why not 或why don’t you +動詞原形?為什么不….?(表示建議)例:Why not/Why don’t you take a walk?★ 某人+had better( not)do 某人最好(不)做某事★ 情態(tài)動詞can/may /must /should+ 動詞原形(包括情態(tài)動詞的否定形式+動詞原形)★ 助動詞do/does/did/will/would在構成疑問句或者構成否定句即don’t /doesn’t /didn’t /will not /would not+ 動詞原形★ be going to + 動詞原形(表示“即將”“打算” 做某事)常見動名詞、分詞的習慣用法總結使用ing分詞的幾種情況。如: is watching TV in the room. were dancing at nine o39。clock last night. be結構中。如:There is a boy swimming in