逸らす的使役态为什么是逸らせる？ 像这样以“す”结尾的他动词的使役态怎么变呢？

逸らす和逸らせる表示一个意思，有什么区别呢？？

这样的他动词本身有使役型的意味了，不用再把它们变成使役态了。逸らせる原型不是逸らす，而是逸る是自动词

使役动词 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leave.get.keep.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。 接宾语时，人称代词用宾格。 he made me(宾格) 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。 ******** 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. ******** 使役性动词（causative verb） 1.make /have/ let +sb +do sth. 2.get/set/leave + sb to do/doing sth.