Can I help you?（改为同义句）
What can I do for you?
This sweater is green(改为复数）
Those sweaters are green
He likes this T-shirt(改为否定句）
He doesn't like this T-shirt
The boy ——under the tree——is Li Lei(对线里面的提问）
Which boy is Li Lei?
what's the price of the skirt(改为同义句）
How much is the skirt?