5. unless conj. 除非;假如不
unless 引导的条件句表示在特定条件下，才决订做或不做一件事。=if...not
The concert will be held as schedule unless there is a typhoon.= The concert will be held as schedule if there is not a typhoon.
6. be afraid to do sth. 害怕干某事
I’m afraid to speak in front of other people.
be afraid of sth. 害怕某事
He told me not to be afraid of difficulties.
be afraid +that从句
I’m afraid that I can’t finish on time
7. be angry with sb.
We were angry with him for keeping us waiting.
be angry at/about sth.
He is angry at/about your answer.
I was very angry at what he said.
8. in the end 最后;终于= at last/ finally
at the end of 在...末端;到...尽头
He married the nice girl in the end/at last/finally.
The school is at the end of the street.
9. careless adj. 粗心的;反义词：careful， 意为“小心的”。
The boy is very careless. 这个男生非常粗心。
He is more careful than me. 他比我认真。
10. advise v.“劝告;建议”n. advice, 是不可数名词.
Give me some advice!
advise doing sth. 建议做某事。
advise sb.to do sth. 建议某人做某事
I advise waiting till the right time. 我建议等到适合的时候。
I advise him not to sleep late every day. 我建议他不要天天睡懒觉。
11. It’s best to do sth. 最容易做某事
It’s best to speak English every day.
12. run away from“ 从…逃离” “逃避”
13. cut …in half “切成两半”
if条件句
if条件句：条件句用于陈述语气，表示假设的状况可能发生，其中 if 是“假如”的意思，引导条件状语从句，if从句用一般目前时，主句则用一般以后时。
注意：在与if条件句连用的主句中大家一般用will 表示以后时，而不需要be going to 表示以后时。
PS：在when, after, before 等引导的时间状语从句中，假如主句为一般以后时，从句要用一般目前时表示以后。
如： I will call you when I reach Canada. 我一到加拿大就给你打电话。
