1、英语中助动词有哪些(1) am, is, are , was , were,(帮助变进行时态,帮助变被动语态)(2) do , does, did (帮助句子变疑问句,否定句。
2、强调谓语动词作用)(3)has ,have (帮助句子变现在完成时态作用)(4) had ,(帮助句子变过去完成时态,以及虚拟语气倒装) (5) will , shall (帮助句子变一般将来时态)(6) would , should (帮助句子变过去将来时态)(7) be going to(帮助句子变一般将来时态)。