3. by bus, on the bus

介词by可以表示乘坐某种交通工具，前面不加任何冠词。如by bike/plane/air/boat等。但在用其它的介词

时，则须加上定冠词。如on the bus/bike, in the car等。

4. take place, take the place of

take place的意思是“发生”，是不及物动词，没有被动语态形式。

Great changes have taken place since he came to the village. 自从他来到这，这个村子发生了巨大的变化。 take the place of 的意思是“代替”。

Teacher Zhang is ill, so I have to take the place of him.

张老师病了，我得代替他的位置。

5. in charge of, in the charge of

in charge of的意思是“负责;掌管”。如：

Mr. Smith is in charge of the whole company.

史密斯先生负责整个公司。

in the charge of的意思是“由……负责”。

The shop will be in the charge of Mike until the manager comes back.在经理回来之前，商店由迈克负责。