請問大大句子裡面的一個問題?

Question

both said they had received warnings of delivery delays on the

world's largest passenger airliner -- which is already two years

behind schedule.

為啥不是which are already two years behind schedule?

Answer 1

最佳解答

airliner後面有個破折號英文叫 Dash

這和中文的標點符號用法相 同

表示後面還有解釋。

which指要說明the world's largest passenger airliner

而the world's largest passenger airliner 是單數

所以 用 is.

Answer 2

因為這裡的關係代名詞 which代表的是前面的 airliner，airliner是單數，所以動詞是 is。

Answer 3

Which is already two years behind schedule？

這一個句子的「主詞」是which ，而which 是單數。

就像who+is但不加are，是相同的道理。

所以既然which 是單數，接的當然就是現在式的be動詞is