重点：①spend time\money on sth.在。上花费时间或金钱。
he didn’t spend much time on his homework.他没在作业方面花很多时间。i spend 200 yuan on a new coat.
我在那件新外套上花了200元。②spend time\money（in）doing sth.花费时间或金钱做某事don’t spend too much time watching tv.
不要花费太多时间看电视。he always spend his time playing football.他总是花时间踢足球。
18、①.be afraid to do sth.害怕做某事。
i am afraid to tr**el by plane.我害怕乘飞机旅行。
.be afraid of sb.\ sth.
害怕某人\某物be afraid of doing sth.害怕做某事she is afraid of the dog.她害怕那只狗。
19、how often多久一次，用来提问动作发生的频率。回答用：once，twice, threetimes等词语。
how often do you play sports?three times a week.
how long多长，用来询问多长时间，也可询问某物有多长。
how long does it take to get to shanghai from here?how long is the ruler?how for多远，用来询问距离，指路程的远近。
how far is it from here to the park?it’s about 2 kilometers.
20、.stay up late指“熬夜到很晚，迟睡”。don’t stay up late next up指“熬夜，不睡觉”。
he stayed up all night to write his +宾语+名词：
we h**e found him (to be) a good boy.我们发现他是个好孩子。
find +宾语+形容词：he found the room dirty.他发现房间很脏。find +宾语+现在分词：
i found her standing at the door.我发现他站在门旁。find +it +形容词+to do sth.
i found it difficult to work out this math problem.我发现算出这道数学题很难。
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