5. be friendly to sb 对某人友好

　 be friendly with sb 和某人友好

4. be certain to do sth

　 be certain of sth

　 be certain + that 从句

3.sth /sb make it + adj +(for sb) to do sth

某物/事使得做某事……

2.feel like doing sth 想要做某事

　feel like sth　 想要某物

1.It’s+ adj +doing sth

　It’s+ adj + to do sth

10.询问人口数量的两种表达方式

　 What is the population of …?

　=How large is the population of …?

Unit 10

9.whether… or …　 无论……也……

8.have problems (in) doing sth 做某事有困难

7.fear sth

　 fear doing sth 害怕做某事

　 fear +从句

6.practice doing sth 练习做某事

　 practice sth 练习某事/物

　 practice + 代词