observe
observe sb doing是什么意思？
sb doing是什么意思？
就是观察到某人正在做什么的意思例句：They observed him entering the bank他们看见他走进银行
observe 的语法点？
observe sb do sth与observe sb doing sth的区别为：含义不同、用法不同、侧重点不同。
一、含义不同
1.observe sb do sth
释义：观察某人做过某事。
2.observe sb doing sth
释义：观察某人正做某事。
二、用法不同
1.observe sb do sth
用法：observe的基本意思是对某人由于其国籍、信仰或职位所作出的建议性、命令性的事情或行为表示关注或尊重，即“看到”“注意到”“观察”“研究”，引申可指“评述”“论述”。
2.observe sb doing sth
用法：observe也可作“遵循”“遵守”解，指谨小慎微、拘泥于礼仪或对某人怀有尊敬或崇拜的感情，observe还可用于表示(按传统习惯)“庆祝”“纪念”。
三、侧重点不同
1.observe sb do sth
解析：强调看到了某人做某事但是不在乎是以前还是现在，前者表看到全过程。
2.observe sb doing sth
解析：强调说这个的当时看到正在做，后者表看到正在做。
所有后加do，to do，doing的词组？
下列动词或词组后面都可以接doing:admit 承认 appreciate 感激 avoid 避免 complete完成 consider认为 delay 耽误 deny 否认 detest 讨厌 endure 忍受 enjoy 喜欢 escape 逃脱 fancy 想象 finish 完成 imagine 想象 mind 介意 miss 想念 postpone推迟 practice 训练 recall 回忆 resent 讨厌 resume 继续 resist 抵抗 risk 冒险 suggest 建议 face 面对 include 包括 stand 忍受 understand 理解 forgive 宽恕 keep 继续例如：Would you mind turning down your radio a little, please? 你把收音机音量调小一点，好吗 The squirrel was lucky that it just missed being caught. 这松鼠幸运得很，刚逃避了被逮住的厄运。 admit to prefer…to be used to lead to devote oneself to object to stick to no good no use be fond of look forward to be proud of be busy cant help be tired of be capable of be afraid of think of burst out keep on insist on count on set aboutput off be good at take up give up be successful in 下列动词或词组都可以用不定式：afford aim agree arrange ask decide bother care choose demand desire determine elect endeavor hope fail help learn long 渴望 mean manage offer plan pretend refuse tend undertake expect hate intend例如： The driver failed to see the other car in time. 司机没能及时看见另一辆车。 He offered to help me. 他表示愿意帮助我。需要省略to的不定式的情况有：1） 情态动词 （ 除ought 外） 后。2） 使役动词 let, have, make后，感官动词 see, watch, look at, notice , observe, hear, listen to, smell, feel, find 等后。注意：被动语态中不能省去to。例如： I saw him dance. 我看见他跳舞。 He was seen to dance. The boss made them work the whole night. 老板让他们整夜干活。 They were made to work the whole night.3） would rather，had better句型后4） Why… / why no…句型后5） help 后可带to，也可不带to, help sb （to） do sth：6） but和except后。but前是实义动词do时，后面出现的不定式不带to。比较：He wants to do nothing but go out. 他只想出去玩。 He wants to believe anything but to take the medicine. 除了吃这药，他什么都信。7） 由and, or和than连接的两个不定式，第二个to 可以省去：8） 通常在discover, imagine, suppose, think等词后作宾补时，可以省去to be。例如： He is supposed （to be） nice. 他应该是个好人。一些重要的区分：1) stop doing/to do stop to do 停止，中断做某事后去做另一件事，stop doing 停止做某事。例如： They stop to smoke a cigarette. 他们停下来，抽了根烟。 I must stop smoking. 我必须戒烟了。2)forget doing/to do forget to do 忘记要去做某事，forget doing 忘记做过某事。例如： The light in the office is stil on. He forgot to turn it off. 办公室的灯还在亮着，他忘记关了。（没有做关灯的动作） He forgot turning the light off. 他忘记他已经关了灯了。（已做过关灯的动作）3)remember doing/to do remember to do 记得去做某事，remember doing 记得做过某事。例如：Remember to go to the post office after school. 记着放学后去趟邮局。Dont you remember seeing the man before? 你不记得以前见过那个人吗?4)regret doing/to do regret to do 对将要做的事遗憾，regret doing 对做过的事遗憾、后悔。例如： I regret to have to do this, but I have no choice. 我很遗憾必须这样去做，我实在没有办法。 I dont regret telling her what I thought. 我不为告诉她我的想法而后悔。5)cease doing/to do cease to do 长时间，甚至永远停做某事，cease doing 短时停止做某事，以后还会接着做。例如： That department has ceased to exist forever. 那个系已不复存在。 The girls ceased chatting for a moment when their teacher passed by. 姑娘们在老师走过时，停了会聊天6)try doing/to do try to do 努力，企图做某事，try doing 试验，试着做某事。例如：You must try to be more careful. 你可要多加小心。 I tried gardening but didnt succeed. 我试着种果木花卉，但未成功。7)go on doing/to do go on to do 做了一件事后，接着做另一件事，go on doing 继续做原来做的事。例如： After he had finished his maths，he went on to do his physics. 做完数学后，他接着去做物理。 Go on doing the other exercise after you have finished this one. 作完这个练习后，接着做其他的练习8)be afraid doing/to do be afraid to do 不敢，胆怯去做某事，是主观上的原因不去做，意为