5)不定式作状语 不定式结构在句中作状语通常都能转换为限制性状语从句。例如作原因状语: 1.They are quite surprised to see the great changes taking place in the area. 2.They are quite surprised because they see the great changes taking place in the area. 3.He was lucky to arrive before dark. 4.He was lucky because he arrived before dark.
作目的状语: 1.She raised her voice to be heared better. 2.She raised her voice so that she could heard better. 3.We went via Heidelberg to miss the traffic jam. 4.We went via Heidelberg so that we could miss the traffic jam.
作结果状语: 1.The French football team played so successfully as to defeat the Brazilians. 2.The French football team played so successfully that they even defeated the Brazilians. 3.He got to the station only to be told the train had gone. 4.He got to the station and was told that the train had gone.
不带to的不定式的使用 动词不定式通常带to,但在有些搭配中不带to,在另一些搭配中可带to可不带to。归纳起来,以下情况下使用不带to不定式:
1) 在can/could, /may/might,will/would,shall/should,must, need,dare等情态动词之后,动词不定式不带to。
2)在表示感觉意义的动词,如see初中英语语法总结,feel,watch,notice,smell,hear,observe等后,或是表示“致使”意义的动词,如have,let,make等后,动词不定式不带to。例如: 1.I often heard him say that he would study hard. 2.I must have him see his own mistakes. 但是,当这类结构转换为被动语态时,后面的不带to不定式一般转换为带to不定式。 例如: 1.He was often heard to say that he would study hard. 2.After he had finished speaking,he was made to answer innumerable questions.
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