What I want to do is (to )tell you the truth. The only thing he could do was ( to) tell the truth. 如果主语中含有do的任何形式, 那么不定式可以省去to。 2、动名词做表语是对主语内容的解释,这时主语与表语位置可互换,动名词常用于口语中。 Its full-time job ...
1. -\-\-What are you doing? -\-\-你在做什么? -\-\-I'm doing the dishes. -\-\-我在洗盘子。 2. -\-\-What's your father doing? -\-\-你父亲正在做什么? -\-\-He's writing an e-mail. -\-\-他正在写电子邮件。 3. -\-\-What's the tiger doing? -\-\-那只老虎在干什么? -\-\-It's runni...
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