英语变为同义句 1 the boy is putting on his shirt.2 let's clean the blackboard.3don't open the window

The boy is dressing himself in his shirt.
Let's have the blackboard cleaned.
Keep the window closed.

2.let's keep the blackboard clean.
3.keep the window open

1.The boy is dressing himself in his shirt
2.Let's wipe the blackboard.
3.Don't let the window open/
或Let the window closed.