Question

Answer 1

to walk => walk 

should => shouldn't

always => alway

of => ∅

we's => we

Answer 2

2 to => bỏ

3 should => shouldn't

4 always => alway

5 of => bỏ

6 We's => We

Answer 3

2.We should walk on the paths

3.We shouldn't drop our rubbish

4.We should always use bins

5.We shouldn't play with animals in fields

6.We shouldn't drink water from rivers