英语中具有使役意义的动词较多，跟人们常常说的使役动词不是一个概念。通常我们说使役动词，是表示使、令、让、帮、叫等意义的不完全及物动词， 一般有make, have, let这三个动词，它们在后接不定式作宾语补足语时要省去不定式符号to。
但具有使役意义的动词数量上远不止这些，用法也较灵活。下面也是先以make, have, let这三个使役词去展开它们的用法。
一、、make
make主要有3种用法，具体如下：
1、make +宾语+do（省to不定式）
表示主语“要”“使”“让”宾语干某事，宾语和宾补之间是一种主动关系。此结构常用被动结构。
例句：
The naughty boy was made to stand there for an hour.
这个调皮的男孩被让在那站了一个小时。
（注意：stand在这里表示被动站那里）
2、make+宾语+过去分词
此结构中的宾语指人时常用到反身代词。
例句：
He raised his voice to make himself heard.
他提高嗓音让自己被听到。
3、make+宾语+形容词
宾语亦可是从句。
例句：
The news made her happy.
这个消息使她快乐。
二、have的用法有以下4种：
1、have +宾语+do（省略to的不定式）
表示主语“要”“使”“让”宾语干某事，宾语和宾补之间是一种主动关系。
例句：
I will have him come and help you.
我会让他来帮助你的。
（在这句话里，I是主语，him是宾语，即I要him干某事。）
2、have+宾语+现在分词
表示让某人或物连续进行某动作或处于某状态中，宾语和宾补是一种主动关系。
例句：
The two cheats had the lights burning all night long.
这两个骗子让灯整晚亮着。
（cheats让light处于一种亮着的状态。）
3、have +宾语+过去分词
表示主语的主观意志，即主语让别人为自己完成某事，宾语和宾补是动宾关系，还可以表示主语遭受到来利或不测的事。
例句：
Tom had his wallet stolen on the bus yesterday.
昨天汤姆使他的钱包被偷了。
（别人偷的，表示主语遭受到来利或不测的事。）
4、have+宾语+形容词/副词/介词短语作宾补
例句：
Please have your tickets ready.
请准备好你的票。
三、let的用法有以下2种：
1、let +宾语+do（省to不定式）
表示主语“要”“使”“让”宾语干某事，宾语和宾补之间是一种主动关系。
例句：
Let them stay in the classroom and do their exercises themselves.
让他们自己待在教室里做练习吧。
2、let+宾语+副词/介词短语作宾补
例句：
Who let you into the building?
谁让你进到大楼里来的？
1.使役动词是表示使、令、让、帮、叫等意义的不完全及物动词,主要有make(使,令), let(让), help(帮助), have(叫)等。
2.使役动词后接受词,再接原形不定词作受词补语。
He made me laugh.
他使我发笑。
I let him go.
我让他走开。
I helped him repair the car.
我帮他修理汽车。
Please have him come here.
请叫他到这里来。
3.使役动词还可以接过去分词作受词补语。
I have my hair cut every month.
我每个月理发。
4.使役动词的被动语态的受词补语用不定词,不用原形不定词。
(主)He made me laugh.
他使我笑了。
(被)I was made to laugh by him.
我被他逗笑了。
使役动词有以下用法：
a. have somebody do sth让某人去做某事
??i had him arrange for a car.
b. have somebody doing sth.让某人持续做某事。
??he had us laughing all through lunch.
注意：用于否定名时，表示“允许”
i won't have you running around in the house.
我不允许你在家里到处乱跑。
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小议“使役动词”的用法
1. have sb do 让某人干某事
e.g:What would you have me do?
have sb/sth doing 让某人或某事处于某种状态，听任
e.g: I won't have women working in our company.
The two cheats had the light burning all night long.
have sth done 让别人干某事，遭受到
e.g:you 'd better have your teeth pulled out.
He had his pocket picked.
notes: "done"这个动作不是主语发出来的。
2.make sb do sth 让某人干某事
e.g:They made me repeat the story.
What makes the grass grow?
notes: I was made to repeat the story.
make sb/sth done/adj./n
e.g. The news made him happy.
He couldn't make himself heard above the noise of the traffic.
His actions made him universally respected.
He made her his wife.
3.get sb to do 使某人干某事
e.g: I can't get anyone to do the work properly.
get sth done 让别人干某事
e.g: I must get my hair cut.
Can you get the work finished in time?
4.leave sb to do sth 让某人干某事
e.g: We left him to paint the gate.
I'll leave you to settle all the business.
leave sb doing 让继续处于某种状态
e.g: Don't leave her waiting outside in the rain.
We left him painting the gate.
leave sth done/adj./prep.phrase
e.g:Please excuse me if I have left any of your questions unanswered.
His illness has left him weak.
I was left with a ray of hope.本回答被提问者采纳
http://www.jichuyingyu.com/Article/grammar/200604/44.html
(flash动画教程)
使役动词是表示使、令、让、帮、叫等意义的不完全及物动词,主要有make(使,令),let(让),help(帮助),have(叫)……,order.....
所谓使役,就是使什么怎么做。比如：
I make the boy cry.我让那个男孩哭了.
I have the girl wait for me.我让那个女孩等我.
总之,使役就是让什么怎么样,或怎么做.
使役动词有以下用法：
a. have somebody do sth让某人去做某事
例：i had him arrange for a car.
b. have somebody doing sth.让某人持续做某事。
例：he had us laughing all through lunch.
c.注意：用于否定句时，表示“允许”
i won't have you running around in the house.
例：我不允许你在家里到处乱跑。
d.have sth done 让别人干某事，遭受到
例：you 'd better have your teeth pulled out.
He had his pocket picked.
notes: "done"这个动作不是主语发出来的。
e.用于被动句时，不定式要加TO
例：I was made to repeat the story.