搜狗做题网the magic show.we began singing.提问sing为啥不用原型,要+ing?
来源：学生作业帮 编辑：搜狗做题网作业帮 分类：英语作业 时间：2024/07/03 10:58:06
the magic show.we began singing.提问sing为啥不用原型,要+ing?
we began singing中began是谓语动词,一句话里只能有一个谓语动词（除非你加了连词或者从句,但是这里没有）,而sing明显就不是谓语动词了,非谓语动词有三种形态,分别为to do,doing,和done,这里用doing是固定搭配.
begin to di 和begin doing
一般来说,begin to do和begin doing可以互换,但在以下三种情况下,用to do：
1.主语不是指人,而是it等.如：It began to rain.
2.begin后接表示心理活动的词.如：begin to know
believe,wonder,think等.
3.begin本身是ing形式,为避免重复后接to do
即,beginning to do
P.S
doing 一般有正在做的意思
to do一般有正准备做的意思
所以doing 就是开始做了to do开始要做,还没做
begin to di 和begin doing
一般来说,begin to do和begin doing可以互换,但在以下三种情况下,用to do：
1.主语不是指人,而是it等.如：It began to rain.
2.begin后接表示心理活动的词.如：begin to know
believe,wonder,think等.
3.begin本身是ing形式,为避免重复后接to do
即,beginning to do
P.S
doing 一般有正在做的意思
to do一般有正准备做的意思
所以doing 就是开始做了to do开始要做,还没做
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