15.　 kind of 有点 He is kind of unhealthy .

14.　 help sb (to) do sth 帮助某人做某事 Good food and exercise help me to study hard .

13.　 of course 当然 = sure , certainly

12． try to do sth　 努力做某事　 He tries to study English hard.

11.　 come home from …… 从……回家

10.　 How many + 名词复数　 How much + 不可数名词 多少……

9． be good for 对……有好处 Eating vegetables is good for your health.

8． want sb to do sth 想要某人做某事

7． as for 至于 对……来说 As for homework , most students do their homework every day .

6． once or twice 一两次　　 three or four times 三四次