He was ____ to go out with his girl friend.A.allowedB.letC.lettedAns:A B,C为什麼错

He was ____ to go out with his girl friend.A.allowedB.letC.lettedAns:A B,C为什麼错
He was ____ to go out with his girl friend.
A.allowed
B.let
C.letted
Ans:A
B,C为什麼错

He was ____ to go out with his girl friend.A.allowedB.letC.lettedAns:A B,C为什麼错
C很明显的,let( let, let)没有letted这种形式.
let 的用法
1）当let后只有一个单音节动词,变被动语态时,可用不带to 的不定式.例如：
They let the strange go.他们放陌生人走了.
---> The strange was let go.
2）当let 后宾补较长时,let 通常不用被动语态,而用allow或permit 代替.例如：
The nurse let me go to see my classmate in the hospital. 那护士让我去探望住院的同学.
----> I was allowed / permitted to see my classmate in the hospital.

LET用于祈使句的开头，表示命令、建议等，不能用于被动形式

[Cn.i no passive 不用於被动语态] (连用的动词不定式在上下文清楚时常省略) allow (sb/sth) to 允许, 让（某人[某事物]）...: Don't let your child play with matches. 别让孩子玩火柴. * My father's only just had his operation and they won't let me see...

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[Cn.i no passive 不用於被动语态] (连用的动词不定式在上下文清楚时常省略) allow (sb/sth) to 允许, 让（某人[某事物]）...: Don't let your child play with matches. 别让孩子玩火柴. * My father's only just had his operation and they won't let me see him yet. 我父亲刚动过手术, 医生还不允许我去看他. * She asked me if she could leave but I wouldn't let her (leave). 她问我她是否可以走, 可我不让她走.
[Tn.pr, Tn.p] allow (sb/oneself/sth) to go or pass in, etc 允许（某人[自己/某事物]）进入, 通过: let sb into the house 允许某人进屋 * I'll give you a key to the flat so that you can let yourself in. 我把房门钥匙交给你, 你可以自己进去. * You've let all the air out of the tyres. 你让车胎的气都跑光了. * Let her past (you). 让她（从你身旁）过去吧. * Don't let the dog out (of the room). 别让狗跑到（房间）外面去. * The roof lets water through. 屋顶漏雨. * Windows let in light and air. 窗户可透光及通风.
[Cn.i no passive 不用於被动语态] (used as an imperative 用於祈使语气) (a) (with the first person plural to make a suggestion 与复数第一人称连用, 用以提出建议): Let's go to the cinema. 咱们看电影去吧. * I don't think we'll succeed but let's try anyway. 我想我们不一定能成功, 但是不管怎样还是试试吧. (b) (in requests and commands 用於要求与命令): Let the work be done immediately. 工作要马上完成. * Let there be no mistake about it, ie Don't misunderstand me. 不要误解我的意思. (c) (used to express an assumption, eg in mathematics 用以表示假设, 如於数学中): Let line AB be equal to line CD. 设AB线与CD线等长. * Let ABC be an angle of 90. 设ABC为一90角. (d) (used to express defiance 用以表示违抗或蔑视): Let them do their worst. 让他们蛮干好啦. * Let them attack: we'll defeat them anyway. 让他们进攻吧, 反正我们必胜.
[Tn, Tn.pr, Tn.p] ~ sth (out/off) (to sb) allow sb to use (a house, room, etc) in return for regular payments 出租（房子﹑ 房间等）: I let (out) my spare rooms (to lodgers). 我把多余的房间出租（给房客）. * They decided to let (off) the smaller flats at lower rents. 他们决定把小单元廉价出租.

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let ---let ---let 时态三式一样 let sb. do sth.让某人做某事
allow sb. to do sth.允许某人做某事
意思是：他被允许与他的女朋友出去。