(3)They might have been polite to you if you ________________a gentleman just now.
如果你刚才表现得像个绅士,他们或许对你就有礼貌了。
(4)The children ________ badly, the teacher kept them after school.
孩子们表现得不好,所以放学后老师把他们留了下来。
2 observe vt. (to watch sb/sth carefully)观察,观测;(to obey rules, laws, etc.)遵守;(to see or notice sb/sth)看到,注意到;(to celebrate festivals, birthdays, etc.)庆祝
(1)observe sb do sth观察/看到某人做某事(全过程)
observe sb doing sth
观察/看到某人正在做某事
observe that…
发现,观察……
(2)observation n.
观察;观察力;观测
be under observation
受到监视
【巧学助记】
[温馨提示] observe后跟不带to的不定式或v.ing形式作补语,即observe sb do/doing sth,不能说observe sb to do sth,但在被动语态中,必须带to。如:He observed someone open the door.→Someone is observed to open the door.
【活学活用】
(1)[2015·江苏卷·阅读A] Always observe district fire bans. Be careful if you smoke or have an outdoor fire or barbecue—make sure ashes are cold before leaving.
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