4 câu sử dụng shouldn't :
We shouldn't throw trash on the street.
We shouldn't damage trees.
We shouldn't throw rubbish into the river.
We shouldn't drive our car so much.
4 câu sử dụng should :
We should Save energy by using solar energy.
We should put he rubbish in the bin.
We should use less plastic bags.
We should ride a bike.

You should follow your dream
You should play sports
You should do exercise every morning
You should eat a lots vegetables

You shouldn't eat a lots candies
You shouldn't ride your bike to fast
You shouldn't play with knife
You shouldn't clim the tree