请帮忙翻译一下。中译英语

1：我发现用英语写信很难
I discovered that writes a letter very difficult with English
2：她每天做大量运动，以便保持苗条
She makes the massive movements every day, with the aim of maintaining slender
3：嘲笑别人是不礼貌的
Ridicules others not politeness
4：直到昨天我们才注意到这件事
Until yesterday, we note that this matter
5：他向他们提出了一些很好的建议
He put forward some very good proposal to them

1\I found it difficult to write letters in English.
2\She exercises a lot every day to keep slim.
3\It's not polite to laugh at others.
4\I hadn't notice this thing until yesterday.
5\He gived some good advice to them.

1：我发现用英语写信很难
I find it hard to write letters in English.
2：她每天做大量运动，以便保持苗条
She exercises a lot everyday to keep slim.
3：嘲笑别人是不礼貌的
It's impolite to laugh at others.
4：直到昨天我们才注意到这件事
It was not until yesterday that we have noticed this matter.
5：他向他们提出了一些很好的建议
He brought fo