6、g形式、过去分词形式还是动词不定式。 ① 作主语,V-ing形式与不定式一般可以互换,意义无多大区别;但在疑问句和句型“Thereisno+主语” 以及itisnogood/use/pleasure/awasteoftime+动名词中,主语需用动名词而不用不定式。 [例2]Doesour (say)thatmeananythingtohim? Thereisno (tell)whatwillhappen. It‘snogood______(smoke)inpublicpla
7、ces. ② 作目的状语或在形容词后作状语,一般用不定式。 [例3] (complete)theprojectasplanned,we’llhavetoworktwomorehoursaday. Youweresillynot____(lock)yourcar.(tohavelocked) ③ 作时间,伴随状语,通常用分词:与逻辑主语是主动关系,用现在分词:与逻辑主语是被动关系,用过去分词。 [例4]Hesawthestone, (say)tohimself,“Theni