Bài 1: chuyển các câu sau sang câu bị động
1, We call them combine harvesters
2, Do they have to grow grass?
3, Why do farmers keep grass in the pasture?
4, We spray chemical fertilizer to make the soil fertile
5, They use the combine harvester for haresting rice crops
6, Farmers use the tractor to pull the phough so that the seed potatoes can be covered
1, We call them combine harvesters
=> They are called combine harvesters.
2, Do they have to grow grass?
=> Does grass have to be grown ?
3, Why do farmers keep grass in the pasture?
=> Why is grass kept in the pasture by farmers ?
4, We spray chemical fertilizer to make the soil fertile
=> Chemical fertilizer are sprayed to make the soil fertile.
5, They use the combine harvester for haresting rice crops
=> The combine harvester is used for harvesting rice crop.
6, Farmers use the tractor to pull the phough so that the seed potatoes can be covered
=> The tractor is used to pull the plough by farmers so that the seed potatoes can be covered.
