在他20岁那年用英语怎么说?就是用这样的句型:when he was in his twenties.为什么twenties要用复数?有没有固定句型?

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在他20岁那年用英语怎么说?就是用这样的句型:when he was in his twenties.为什么twenties要用复数?有没有固定句型?

在他20岁那年用英语怎么说?就是用这样的句型:when he was in his twenties.为什么twenties要用复数?有没有固定句型?
在他20岁那年用英语怎么说?
就是用这样的句型:when he was in his twenties.为什么twenties要用复数?有没有固定句型?

在他20岁那年用英语怎么说?就是用这样的句型:when he was in his twenties.为什么twenties要用复数?有没有固定句型?
in his twenties是固定句型,更多含有“二十几岁”的意思,换而言之从额21 到29都可以包含,所以是用众数twenties,如果指明是二十岁的话,用twenty years old会适合点,即when he was twenty years old 或when he was twenty

这是一个固定用法,意思是,在他二十几岁时,并不一定就确定为20岁。
如果确定20岁,when he was twenty years old.

这里指的是在他二十多岁的年纪。这种句型很多。如 in 1990s,指的是二十世纪九十年代。你可以这样理解,in his twenties,包括从twenty 到twenty nine。这十个数都含有twenty这个单词,是不应该加s呢。

有固定句型in one's +基数词复数,
比如in 1980’s在20世纪80年代

就是指一个人二十几岁的时候,所以用twenties。没有什么固定的巨型。

In his 20 year old of that year

20个岁月

如果是说刚好在他20岁那年:When he was at the age of twenty years old.
如果说在他20多岁时:when he was in his twenties. 用复数,表示不是一年,而是20~29岁期间。

at his 20s

在他20岁那年
1.when he was in his twenties 为什么twenties要用复数?20几岁
2.when he was twenty
2. at the age of twenty

when he was 20
他20岁时