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请问think和thinkof,because和becauseof,approve和approveof等有什么区别吗?

题目详情
请问 think 和think of ,because 和because of ,approve和approve of 等有什么区别吗?
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答案和解析
带有介词的词组后只能接名词或动名词构成介宾结构,而不能接句子.而前者单词后可接句子.如,He did not come because he was ill.= He did not come because of his illness.