1、补足语有宾语补足语和主语补足语两种，通常前一种提到的多，后一种提到的少。宾语补足语所起作用就是补充说明动作的内容，方式等。主语补足语补充说明主语的状态，特征等。
2、常接形容词作宾语补足语的动词有：keep, make, find等。如：We must keep our classroom clean.
3、常接名词作宾语补足语的动词有：call, name, make, think等。如：We call them mooncakes.
4、常接动词-ing形式作宾语补足语的动词有：see, watch, hear, find, keep等。如：In the country, we can hear birds singing.
5、常接介词短语作宾语补足语的动词有：keep, find, leave等。如：I left my pen on my desk at home.
6、常接带to的动词不定式作宾语补足语的动词有：ask, tell, want, teach, wish等；接不带to的动词不定式作宾语补足语的动词有：see, watch, hear, make, let等。如：I often see him play football.
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