4.to take off : (to remove-said also of clothes)
【说明：】to take off (脱去)与put on 的意义相反，指脱去衣物鞋帽.民可以用put off, 但较不通用。
【例：】
(1) John took off his hat as he entered the room.
约翰在这屋时脱下他的帽子。
(2) Is Helen taking off her coat because it is too warm in the room?
海伦是不是因为室内太暖和而脱去她的外衣呢？
5.to call up: (to telephone)
【说明：】to call up (打电话给……)后面一定要有受词，也就是接电话的人。如果受词是代名词的话，常插在call与up 之间。
【例：】
(1) I forgot to call up Mr. Jones yesterday although I promised to call him up exactly at three o’clock.
我昨天忘记打电话给钟斯先生，虽然我答应了在三点钟的时候打电话给他的。
(2) Did anyone call me up while I was out?
我出去的时候有人打电话来找我吗？
6.to turn on : (to start, begin)
【说明：】to turn on (扭开，打开)指扭开电灯，电炉，电扇，煤气等的按钮或开关，以及自来水的水龙头等而言。开电灯也可以用put on the light.
【例：】
(1) Please turn on the light. This room is dark.
请你扭开电灯，这房间太黑暗了。
(2) Someone turned on the radiator in this room while we were out.
我们外出时，有人把房内的电炉扭开了。
7.to turn off : (to stop, terminate extinguish)
【说明：】
to turn off （关闭，停止）指扭熄电灯，关闭无线电、自来水等。关灯也可以用put out the light.
【例：】
(1) Please turn off the light. We do not need it now.
请把电灯关了，我们现在不需要它。
(2) Shall I turn off the radio or are you still listening to it?
我可以把收音机关掉吗，你是不是还要收听呢？
