to 动词不定式的标志,后接动词原形
to 叫做小品词,就是我们常说的介词,后面接名词性的词做宾语。如:名词,代词,动名词(doing)
用法例如:
we are looking forward to 2012 Olympic Games.
she sent a present to me.
be used to doing sth.
其他介词如:with, in, on, at, about, for, of, like(像), except, without, within, after, before, from, etc.
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