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26.see / hear / watch / notice sb. do ( doing) sth. 看见 / 听见某人做某事 /正在做某事
能听见她在隔壁房间里唱歌吗？ Can you hear her singing next door / in the next room?
27.sth. be two meters (years) long (old) …两米长 /…两岁大
长城大约6,700 千米长。
The Great Wall is about 6,700 kilometers long.
28.It’s important / difficult / easy /convenient/ necessary / possible / impossible for sb. to do sth. 做某事对某人来说很重要 / 困难 / 容易 方便/ 有必要 / 可能 / 不可能
对小孩子来说，养金鱼很容易。
It’s easy for kids to keep goldfish.
对学生们来说，每天有足够的睡眠很有必要。
It’s necessary for students to have enough sleep every day.
29.One…the other…/Some… others… 一个…另外一个（两个中）/ 一些…一些
老师进来了。我看见他一只手拿着书，另一只手里拿的什么？
The teacher came in. There’s a book in one hand and what’s in his other hand?
有的家长认为应该允许学生上网，而有的家长则不同意。
Some parents think students should be allowed to surf the Internet, while others don’t agree.
30.used to do/be… 过去常常
她过去常常害怕孤独。
She used to be afraid of being alone.
adj. 不可能的，做不到的
adj.
