to后如跟的是名词、代词、动名词,则可判定这个to为介词,因为介词后才跟名词、代词、动名词形式;如to后跟的为动词原形,则to 为不定式,不定式to后才加动词原形,这即是判断to的依据。一般来说,下列词组中的to为介词:
1、pay attention to 2、lead to 3、stick to 4、get down to 5、devote to
6、look forward to
如:We are looking forward to traveling to Europe.
这两个to均为介词。
Please pay attention to the man in black.(介词)
I want to talk business.我要谈正经事。(动词不定式)
To act like that is foolish.那样做是愚蠢的。(动词不定式)
:(1)to 作为不定式时后面接动词原形。
例如:get to know , want to do
(2)to 作为介词时,后面接名词,代词或动词ing
例如:give it to me 把它给我
give them to the students
devote oneself to working
全身心地工作。
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