observe vt. 观察；注意到；评论；遵守；庆祝(节日)

　　(教材P2)As Polly observed the passengers on the train，she had a feeling that she was being watched by a tall man in a dark overcoat.

　　当波莉打量地铁车厢里的乘客时，她感觉有个穿着黑色大衣的高个男人一直在看着她。

　　　写出下列句子中 observe 的汉语意思

　　①How many festivals do we observe in a year？庆祝

　　②So far the cease­fire has been observed by both sides.遵守

　　③When driving，minimize noise and observe no smoking signs.观察

　　④She observed that the book is good.评说

　　(1)observe sb. do sth.　　　　注意到某人做某事

　　observe sb. doing sth. 注意到某人正在做某事

　　(2)observation n. 观察

　　(3)observer n. 观察者

　　⑤The woman was observed to_follow him closely.有人看到那女子紧跟着他。

　　⑥They were observed walking towards the supermarket.有人发现他们正朝超市走去。

　　[名师点津]　observe sb. do sth.结构如果改成被动语态，应补上省略的to，即sb. be observed to do sth.，类似用法的动词还有see, watch, hear, feel等。

　　[图形助记]　

　　观察　　　　　遵守　　　　　庆祝

　　[语境助记]　

When we attend the parade to observe National Day，we must observe the traffic regulation.If we observe someone run a red light，we should stop him.