前有do后无to的句型有哪些用法?
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发布时间:2024-05-06 03:33
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时间:2024-08-22 10:17
前有do后无to的句型有哪些前有do后无to的用法。
具体参考如下:(1)连词连接两不定式前面的有do后面的to do的to省略,如: I have nothing to do but watch TV all day long. Tom have no choice but to give it up.
(2)用is连接,不定式作表语时前面主语有do时后面表语to do的to省略,如: What I want to do is stay at home. What I want is to stay with you.
(3)注意这里说的前有do后无to的前面的do要是实意动词do,不能是助动词do
规律:
1.but/except前有实义动词(有些老师也叫行为动词)do的各种形式,but/except后面要用“不带to的不定式(即动词原形),反之需要加to"
2.但是最关键的是在美国英语中有3个短语can't but do: can't help but do: can't choose but do已经是惯用法了,不能按第一条规律遵守。