pick up 卷起；(用车)接某人

make up 构成；编造

put up 修建；张贴

set up建立；创立

take up 从事；占据 all the time 一直

at a time一次，每次

at one time曾经，一度

from time to time有时

have a good time

玩得高兴 　　

背教材原句 记句式结构 仿写促落实 1.They can destroy houses，but leave the furniture inside exactly where it was.

它们能毁掉房子，却把房内的家具留在原处。 "leave＋宾语＋宾语补足语"结构，表示"让......处于某种状态"。 他们一起离开了，让我独自一人坐在那里。

They went off together and left me sitting there alone. 2.On average，there are 800 tornadoes in the US each year，causing about 80 deaths and 1，500 injuries.

平均来说，美国每年发生800次龙卷风，造成大约80人死亡，1 500人受伤。 现在分词短语causing about 80 deaths and 1，500 injuries作结果状语。 大火持续了近一个月，几乎没剩下什么有价值的东西。

The fire lasted nearly a month，leaving nothing valuable. 3.By the time it ended，more than 700 people had been killed and 2 700 had been injured.

等到风停时，已有700多人死亡，2 700多人受伤。 by the time"到......为止"，此处相当于连词，引导时间状语从句。 当消防车到达的时候，火已经被居民们扑灭了。

By the time the fire engine arrived，the fire had been put out by the inhabitants.

　　 experience n．经验；经历vt.经历；体验

　　(教材P21)Have you ever experienced a flood?

　　你曾经经历过洪灾吗？

　　(1)have experience in sth. 在......方面有经验

　　from/by experience 凭经验；从经验中(得出)

(2)experienced adj. 有经验的，熟练的