5.5. Although she eats fruits and vegetables every day, she keeps gaining weight.she eats fruits and vegetables every day, she keeps gaining weight.

−- Cấu trúc: S + V, but + S + V...

                  = Although + S + V, S + V...

6.6. Mark's put on 5 kilos since he quit smoking.on 5 kilos since he quit smoking.

−- gain weight = put on weight: tăng cân

7.7. Joana doesn't eat much because she doesn't want to be overweight.she doesn't want to be overweight.

−- in order to: để làm gì

8.8. You should do exercise regularly.should do exercise regularly.

−- Cấu trúc: It's a good idea to V = S + should + V...