句型转换1.The story happened three years ago.(改为同义句）The story___

句型转换
1.The story happened three years ago.(改为同义句）
The story_____ ______three years ago.
2.Warm and dry clothes are necessary to take when you go out for a travel.（同上）
It______ _____ ______take warm and dry clothes when you go out for a travel.
3.To finish the work in two hours is too hard for us.(同上）
______is______for us________finish the work in two hours.
4.Hurry up,or you will miss the early train.(改为由if导引的条件状语从句)
If you______ _______ ______,you'll miss the early train.
5.He has been dead for three years.(改为一般过去时)
He_____three years______.