(8) John will come soon.
(9) Shall I go with them?
(10) You may quit whenever you wish.
(11) We must not eat too much meat.
(12) Tony wished his friends could help him.
不管带to与否,不定式动词的性质是不变的。
To的另一个功能是当介词,性质和at, in, on, for, with等一样,只是形式和不定式动词的标志一样而已。正因为样貌相似,介词to在某些句式中常被误以为是不定式动词中的to而引起用法上的错讹。文章开头提到的hear和hearing之争,便是最好的例子。
须知look forward to 是个片语动词,这里的to是个介词,后面要带宾语(object)(即名词、代词或动名词),如I look forward to your reply. / it. / hearing from you.
下面这句情况一样,所以(13) a 错,(13) b对:
(13) a. Are you used to live in a hot country like Singapore?
(13) b. Are you used to living in a hot country like Singapore?
根据这原理,下列这些惯用语中的to 都是介词,不是不定式动词的标志。既然是介词,就要有宾语:
(14) Do you object to(反对)picnicking on every weekend?
(15) Many people learn English with a view to(目的是)getting a good job.
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