英语..帮帮忙.. 按要求改写句子..

英语..帮帮忙.. 按要求改写句子..
1、Please turn on the light.（改为否定句）、
Please ____ ____ ____ the light.
2、The new born baby weighs about 4 kilograms.（对划线部分提问）
____ ____ ____ the new born baby ____?
3、Everyone should help others.（对划线部分提问）
_____ should everyone _____?
4、We must learn English well.（改为同义句）
It is____ _____ for us ____ learn English well.
5、I could ride a bike when I was 5 yuans old.（改为同义句）
I ____ ____ ___ ride a bike at 5.