英语中的句子并不总是遵循着主语+动词+宾语的规律。跟我们的母语一样，有时主语什么也不做，但是却导致别人去做些事情。所以，逻辑上我们把导致别人行动的动词叫使役动词。最常见的使役动词有：let / make / have / get.
Do you like Linda’s new hairstyle? She had her hair cut yesterday.
Why don’t you get your hair cut in a new style?
The teacher made us do four hours homework yesterday.
A lot of parents let their teenage children drink alcohol at home.
You shouldn’t let your dog annoy people on the beach.
Do you think parents should let their teenage children smoke at home?
My parents won’t let me go out.
If you let me drive your car to the party, I’ll wash the dishes.
规则其实很简单
let+ 名词 + 动词原形
My neighbour lets his children play computer games when they are at the dinner table!
make + 名词 +动词原形
I never made my children do homework. I believed that it was their responsibility.
I make my dog sleep outside at night. I make him eat outside too.
make+ 名词 + 形容词
严格意义上讲，如果名词后面接了形容词，这不算使役动词。但是我们要注意这个结构，与使役动词后面加过去分词是一样的。看下面的例句：
Chocolate makes people happy!
The news on TV makes some people depressed.
Exams make most people nervous.
Shopping makes me tired.
chocolate, TV news, 还有exams影响了情感. Depressed 和 tired 是ed结尾的形容词/过去分词
have+ 名词 + 动词原形
I have the doctor check my blood pressure every visit.
I always have my daughter cook dinner on the days I see the doctor.
have+ 名词+ 过去分词
I had my teeth whitened last week.
My husband will have his car serviced tomorrow.
get+名词 + 过去分词
I get my hair cut once a month.
Linda gets her house cleaned every week.
get + 名词 + 不定式
A lot of parents are trying to get their children to play more sport.
How can we get children to eat more vegetables?
大家看到了吧，上面的例句中主语并没有做动词的动作。至于have后面什么时候用过去分词什么时候用动词原形，get后面什么时候用过去分词什么时候用不定式，你发现规律了吗？
欢迎大家在下面留言。
请继续关注Jason老师
想过你为什么没学好英语吗？
因为你没有真正的掌握英语学习的方法！
学英语不能输在起跑线上，
关注我们Jason-English8，学习别人不会告诉你的英语学习方法，真正的进入英语世界！
