He was ____ to go out with his girl friend.

He proposed to his girlfriend with a diamond~

He proposed to his girlfriend with a diamond.
他用钻石向女友求婚。
本句用了过去式，说明这件事情发生在过去，描述了一个过去的事实。

He did not go out in holiday before but now he often goes out with his girl friends.

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 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.

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。

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让胡路区13931104377： he was made to go .这句话是什么意思? - ？
能封施复： 他要走了

让胡路区13931104377： He was about to go to bed - -- - there was a knock on the door. - ？
能封施复： 只能填写when因为这是高中的重要短语,以前的版本 现在书上没有,但是经常考, sb be about to do sth ---when sth happen. 某人正要做某事 突然(就在那时)另一件事情发生了. 此处的when相当于 at that time ,不能用while代替. 这是两者的区别所在!

让胡路区13931104377： He was about to go out for a walk ____ - it begin to rain.a.when b.while c.as选B 为什么?A.C 为何不可 他们将要出去的时候就开始下雨了,应该都是瞬间动... - ？
能封施复：[答案] while在这里表示转折的意思,就是说他们准备出去散步的时候却下雨了,如果是选when/as的话,就变成开始下雨的时候他准备去外面散步

让胡路区13931104377： 填什么?He was about to go to bed ____ - the doorbell rang. He was about to go to bed ______ the doorbell rang. - ？
能封施复：[选项] A. while B. as C. until D. when

让胡路区13931104377： he was seen to go out by me为什么要用to go - ？
能封施复：[答案] 这是被动语态的句型,be -ed to do sth

让胡路区13931104377： He was only too glad to go是什么意思呢? - ？
能封施复： 不可以,去掉以后意思就反了.only too adj. to是表示肯定,去掉only就表示:太……而不能.

让胡路区13931104377： 这句英语是什么意思? He was content to go as far as he could. - ？
能封施复：[答案] 他愿意尽可能走远.be content to 是愿意做某事 的意思.as far as...像.一样远

让胡路区13931104377： 选择题 he was made ( ) A,go B to go 为什么答案会是A呢?谢谢？
能封施复： 我觉得是b嘛,be made to do sth.

让胡路区13931104377： He was used to go to work on foot,but now he takes a taxi to work.这个病句错在哪里? - ？
能封施复： 去掉was used to 是固定用法.表示过去常常做某事 be used to do,表示被用来做什么 be used to doing表示习惯于

让胡路区13931104377： 这句英语是什么意思? He was content to go as far as he could. - ？
能封施复： 他愿意尽可能走远. be content to 是愿意做某事 的意思. as far as...像...一样远