預(yù)約高中1對1精品課程(面授/在線)，滿足學(xué)員個性化學(xué)習需求 馬上報名↓
基數(shù)詞在用來表示準確數(shù)字的情況下不能加復(fù)數(shù)后綴"s"。以下基數(shù)詞可以加復(fù)數(shù)后綴"s"，因為它們表達的都是大概的數(shù)字。
1.thousands of / millions of / hundreds and hundreds of / hundreds of thousands of / thousands upon thousands of 成千上萬……
例：There are hundreds of thousands of people in the park. 公園里的人有千百個。
2. in twos and threes 三三兩兩
例：They came home from church by twos and threes. 他們?nèi)齼蓛傻貜慕烫没貋怼?/p>
3. at sixes and sevens 亂七八糟
例：His wife was away and the house was at sixes and sevens. 他妻子不在，家里亂七八糟的。
4. in one's fifties 在五十多歲時(fifties 前可插入 early, late, mid-, middle)
例：The boys are all in their teens. 那些男孩年紀都在十幾歲。
Jane is only in her early forties. 簡才剛剛四十出頭。
She was in her mid-twenties. 她有二十五、六歲。
He was then in his late seventies. 他當時已經(jīng)快八十歲了。
5. in the 1960s (in the 1960's) 二十世紀六十年代
例：He made acquaintance of her in the 1960s. 六十年代他認識了她。
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