你做7道题，我给100分，但是要求每道题都有详细解释，因为我要讲给别人听，所以不光要答案，还要为什么，谢谢O(∩_∩)O~~~

put the verbs in brackets into the correct tenses:

1.I_(be) happy to assist you in any way possoble.
2.He used to live here when he_(be) young.
3.It _(rain)when we_(leave),but by the time we _(get) to the cinema,it_(stop).
4.A:They are throwing crockery at each other in the next flat.
B:_this_(happen) before?
A:No.This is the first time they_(throw) crockery.
5.For the last two years, he_(write) a history of American Civil War.He_(complete) the book by the end of June.


Put the verbs in their correct form
1.The manager directed that Mr.Stevens _(give) that assignment.
2."You finally made it,didn't you?"
"Yes,but for your help,I_(not,succeed).

put the verbs in brackets into the correct tenses:

1.I_(be) happy to assist you in any way possoble.
will be ---- 陈述句，表达的是将来语气
我会以任何可能的办法帮助你。
当表示的是对某种将来的行为，动作，发生的事情感到happy,用将来时态，Iwill be happy；如果对（可能是看到或听到的）某种状态或者事实感到happy,用现在时态：I am happy。 如：
She is a happy girl.
她是个快乐的小姑娘。(事实状态 )
I'm very happy that your health is showing signs of improvement.
看到你的健康状况显出好转的迹象,我非常高兴。（事实）
I'll be happy to meet them when I have time.
"我有空的时候,很乐意同他们见面。"（不是现在，将来碰到）

2.He used to live here when he_(be) young.
were --- 主句过去式(used to 过去...),状语从句用过去式。

3.It _(rain)when we_(leave),but by the time we _(get) to the cinema,it_(stop).
was raining --- 过去持续的某种动作
left --- 主句过去（进行）时态，状语从句用一般过去式
got --- 过去某个时间点发生的动作
stopped ---- 同上

4.A:They are throwing crockery at each other in the next flat.
B:_this_(happen) before?
A:No.This is the first time they_(throw) crockery.
Did this happened -- 根据上下文和before，表明是过去时态
throw --- 表明现在这个时候的一种事实状态。


5.For the last two years, he_(write) a history of American Civil War.He_(complete) the book by the end of June.

has been writting or has written --- 从两年前到现在持续的动作，我认为现在完成进行时更好。
will complete or will have completed --- 6月底会完成，可以用将来时或者将来完成时。will complete更常用。


Put the verbs in their correct form
1.The manager directed that Mr.Stevens _(give) that assignment.
would give---过去某个时刻， 经理指示由斯蒂文先生分配任务。过去的将来，用过去将来时态

2."You finally made it,didn't you?"
"Yes,but for your help,I_(not,succeed).

would not have succeeded
“你做到了，不是吗？”
要不是你的帮助，我不会成功，事实是你帮了我，我已经成功了，所以用would not have -ed表示虚拟语气---与事实相反。

but for 要不是；如果没有
But for my brother's help, I would not have finished.
要不是我兄弟的帮助，我是无法完成的。