He plays tennis very well

He is a good tennis player

My sister walk to the supermarket near my home

My sister goes to the market on foot near my home

We pollute the air.we have breathing problems

If we pollute the air,we will have breathing problems

Ha Noi is large,but New York is larg

Ha noi is a smaller city than New York

`text(Xin hay nhất)`

`1` . He is a good tennis player

`->` Play tennis well = A good tennis player - nghĩa tương đương nhau đều chỉ là một người chơi tennis rất giỏi

`2` . My sister goes to the supermarket near my home on foot.

`->` walk = go on foot : đi bộ 

`3` . If we don't pollute the air , we won't have breathing problems.

`->` Câu điều kiện loại 1 : If +S + V , S + will/won't + Vinf

`4` . Ha Noi is a smaller city than New York

`->` So sánh hơn