重点讲解：
1. go bad
变质的；腐烂的；
eg. They bought so much beef that some went bad.
他们买了太多牛肉，有些都变质了。
eg. Fish soon goes bad in hot weather.
鱼在热天气里不久便坏了。
2. watch out for
密切注意；戒备；提防；
eg. The doctor told her to watch out for symptoms of measles.
医生叫她注意麻疹出现的症状。
eg. Watch out for that man.
要提防那个人。
3. get rid of
扔掉；丢弃；
eg. Let's get rid of this mouldy old furniture.
咱们把这件老掉牙的旧家具扔掉吧。
eg. It is difficult to get rid of deep-rooted habits.
积习难除。
4. peel off
剥掉；剥落；
eg. One of the kids was peeling plaster off the wall.
其中一个孩子在剥墙上的灰泥。
eg. The paper was beginning to peel off the walls.
墙上的纸渐渐脱落了。
5. cut up
切开；切碎；
eg. The woman cut up the watermelon and shared it out among the four children.
那妇人把西瓜切开，分给四个小孩。
eg. Cut up the carrots before you put them into the pot.
把胡萝卜切碎后再放进锅内。
6. out of
（表示比例）每…中；
eg. About 26 million Filipino people, almost one out of every three citizens, cannot afford the basic medicine they need.
大约有二千六百万菲律宾人，即近三分一的人口，连基本的药费也无法负担。
eg. The professor scared the bejesus out of me when he said today that three fourths of the class failed.
教授今天说全班四分之三的人不及格，吓死我了。