“had better”(“had best”与“had better”意思相同,只是没有“had better”使用普遍)后面接不带“to”的不定式,没有人称和时态的变化,不因主语人称、数或谓语时态等变化而变化,但不定式可以有时态和语态的变化。例如: I think we had best take our leave. He thinks he had better(不是has better)follow thedoctor's advice. We'd better be going now. It had better be done. 另外,“had better”这一习语的内部关系极为紧密,除了疑问句外,词组内部一般不可摄取其它词,包括否定词“not”。其规范的否定式应为“had better not”,而不是“hadnot better”。例如: You had better not stay here.(你最好别呆在这儿。) “had better”有自己的被动语态,其结构是:主语/ hadbetter / be /过去分词。如: That foolishness of yours had better be stoppe,英语论文范文,英语毕业论文 |