用简短的句子结构作插入语.它们常置于句中或句末.这类简短的句子有:I am sure.I believe.do you know.you see.I’m afraid.it is said.what’s more.what’s worse.that is.what is important等. 常用作插入语的不定式短语有:to be sure.to sum up.to tell the truth等. 【查看更多】

 

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