_________(not receive) a single letter from her family ,Lucy

_________(not receive) a single letter from her family ,Lucy felt rather down.
He usually leaves school at 6pm ,by which time all the other teachers ______(arrive) home.
__________(give) more time,we could have done better.
The novel ______(translate) into Chinese before long was written by a famous Russian writer .
When we ______(go) to London for the third time ,he found himself in a place so familiar to him.
______(see) that he could do nothing to comfort her ,he felt sorry.
The man in brown was considered _____(see) everything that happened in the supermarket.
I could have won the championship,but I _____(feel) so nervous.
This is not the first time you _____(tell) me a lie.
When and where to hold the discussion ______(not decide) yet.
The girl insisted on her ______(not marry) the man that her parents were fond of.
School will begin.The new dormitory building must ____(complete) by next week.
By the time you _____(graduate),you will have learned English for ten years.
_____(write) in a harry ,his letter is full of grammatical mistakes.
请帮我填一下,顺便能尽量详细的讲解一下,为什么这样填,最好有翻译的~

1. __Not receiving__(not receive) a single letter from her family ,Lucy felt rather down. (动名词结构做状语表原因或伴随状态：连一封家里的信都没有收到,LUCY觉得非常失望.)

2. He usually leaves school at 6pm,by which time all the other teachers _had arrived_(arrive) home. (这是一个时间状语从句,主句一般过去时,从句过去完成时：他经常下午6点离开学校,而这个时候其他所有的老师都已经回到家了.)
3. __If gave_(give) more time,we could have done better.
(虚拟语气,IF+动词过去式：如果给多点时间,我们会做的更好点.)
4. The novel _been translated__(translate) into Chinese before long was written by a famous Russian writer . (时间状语从句,主句一般过去时,从句过去完成时,这里从句还是被动语态：这本很多年前就被翻译成中文的小说,是一个著名的俄国作家写的)
5. When we _went_(go) to London for the third time ,he found himself in a place so familiar to him. （一般过去时态,用动词过去式：当我们第三次去到伦敦的时候,他感觉自己在一个如此熟悉的地方.）
6. __Seeing__(see) that he could do nothing to comfort her ,he felt sorry. (动名词结构做状语表原因或伴随状态：看到自己不能做任何事情来安慰她,他感到很抱歉.）
7. The man in brown was considered _to have seen_(see) everything that happened in the supermarket. （be considered to do sth+过去完成时态：这个穿着棕色衣服的男人被认为看到了这个超市发生的所有事情.）
8. I could have won the championship,but I _still feel_(feel) so nervous. （still,仍然,表转折：我可能已经赢得这个锦标赛了,但是我仍然感觉如此紧张.）
9. This is not the first time you _told_(tell) me a lie.
（一般过去时,表过去时间经常存在的动作或状态：这不是第一次你对我撒谎了.（表示过去他就一直对他撒谎））
10. When and where to hold the discussion _is not decided_(not decide) yet. （被动语态：什么时候和在哪里举行讨论,还没有被决定好.）
11. The girl insisted on her__wouldn't marry__（not marry) the man that her parents were fond of. （情态动词的一般过去世态：这个姑娘坚持她不会嫁给这个她的父母非常喜欢的男人.）
12. School will begin.The new dormitory building must _be completed___(complete) by next week. （情态动词后接动词原形,这里动词是被动语态,所以be动词为原形：学校要开学了,新宿舍的建设必须在下周完成.）
13. By the time you _graduated_(graduate),you will have learned English for ten years. （虚拟语气,用动词过去式：等你毕业的时候,你将已经学了10年英语了.）
14. _Writting__(write) in a hurry ,his letter is full of grammatical mistakes. (动名词结构做状语表原因或伴随状态：由于写得非常匆忙,他的信里满是语法错误. hurry,不是harry.
得不到这分算我白辛苦了!