是某人做某事的时候了(should不可省略)

　　①There was a time when this kind of music was very popular.

　　曾经有个时期这种音乐很流行。

　　②This is the first time that I have been scolded by my parents.

　　这是我第一次被父母责骂。

　　③It's time we had/should have (have) a party to celebrate their victory.

　　我们该举行一次聚会庆祝他们的胜利了。

　　[点津]　做题时，不要一见到先行词是表示时间、地点或原因的名词就用when，where或why引导定语从句，而应首先看看引导词在定语从句中作什么成分。如果作时间、地点或原因状语，则用when，where或why，若作主语和宾语，那么就要考虑用that/which来引导定语从句了。

　　④Do you still remember the days (that/which) we spent together?

　　你还记得我们一起度过的日子吗？(关系词作宾语)

　　2．I thought, at the time, that this was just a story but then I witnessed it with my own eyes many times.(P20)

　　当时我以为只是个故事罢了，但是后来我亲眼见过多次。

　　★witness vt.当场看到；目击n.目击者；证人；证据

　　(1)witness (sb.doing) sth.　　目击了(某人做)某事

　　(2)be (a) witness to sth. 目击、看见(某事发生)

　　bear/give witness to sth. 为......作证；证明

　　①Did you witness the terrible accident opposite the post office?

　　你亲眼目睹了邮局对面发生的那次事故吗？

　　②His good health is a witness to the success of the treatment.

　　他的身体健康证明这种疗法是成功的。

　　[点津]　英语中，动词see, witness, find, notice, say, discover, observe等的主语可以是地点名词、时间名词，这是一种拟人修辞法。

　　③(2014·天津高考书面表达)Our city witnesses four different seasons, plenty of sunshine and good rainfall, but in winter you may feel a little cold.

　　我们的城市见证了四个不同的季节，充足的阳光和雨量充沛，但在冬天，你可能会觉得有点冷。

　　[串记]　The witness who witnessed the accident gave witness to the police and promised to be a witness.

　　这个目击了这场事故的目击者向警察提交了证据并且答应做证人。

3．We ran down to the shore in time to see an enormous animal opposite us throwing itself