以下句子 是汉译英 我把自己翻译的写在下面 希望能帮忙一下

1. A serious traffic accident happend to Lilei yesterday. (若非为了强调，时间状语通常放句末)
2. Mr. Smith can not be at home. He went to beijing yesterday. (说的是昨天的事情，过去时)
3. Hemingway is her favorite author.
4. Have you found abnormal smell? (现在完成时更好，因为说的内容延续到现在都有效)
5. It is important to study English well, because English is a main course (或者 main subject). (because和so一起用，是个典型错误)

1. There was a serious traffic accident happened to Lilei.
2. Mr. Smith couldn't be at home, he went to Beijing yesterday.(过去式)
3. Hemingway is her favorite author.
4. Have you found abnormal smell?(这个更好)
5. It is crucial to study English well because it is a major subject. （crucial 是至关重要的意思）

第一句有问题，建议:LIlei suffered a serious traffic accident yesterday.
第二句的汉语本身就是个病句！
第三句：建议不要用author,他是指发起人为主，还是用常用的writter吧
第四句：首先用过去式。还有Did已经是过去式了，found要用原型，而且建议用smell作动词
第五句：because,so不能同时出现了。. English is a key subject,so it is important to study it well.

1. Yesterday li lei had  a serious traffic accident

2. Mr. Smith may be not at home,  he went to Beijing yesterday

3. Hemingway is her favorite author

4.  have you found an unusual smell?

5. English is an main subject, so it is very important to learn it well

1.没有问题
2.现在完成时
3.没问题
4.第二个
5.[BECAOSE] English is a main subject , so it is vital to study well .【有了becaose就不能用so，有了so就不能用becaose，按照你自己喜欢来用】

DIdn't you find any abnormal smell?