一般情況,I后都接WAS等單數(shù)形式
If I were a boy.此句型為虛擬句型,后接主語(yǔ)+SHOULD形式
在虛擬句型里,不管從句主語(yǔ)是什么,都是主語(yǔ)+WERE的形式
When I was ten years old ...這句為一般句型,即時(shí)間狀語(yǔ)從句,所以用WAS
既然看到你問(wèn)了,我就在這里補(bǔ)充一下虛擬語(yǔ)氣的問(wèn)題：
非真實(shí)條件句
1）時(shí)態(tài)：可以表示過(guò)去,現(xiàn)在和將來(lái)的情況.它的基本特點(diǎn)是時(shí)態(tài)退后.
a.同現(xiàn)在事實(shí)相反的假設(shè).
句型 ：條件從句 主句
一般過(guò)去時(shí) should( would) +動(dòng)詞原形
If they were here,they would help you.
b.表示于過(guò)去事實(shí)相反的假設(shè).
句型：條件從句 主句
過(guò)去完成時(shí) should(would) have+ 過(guò)去分詞
If she had worked harder,she would have succeeded.
The rice would not have been burnt if you had been more careful.
If my lawyer had been here last Saturday,he would have prevented me from going.
If he had come yesterday,I should / would have told him about it.
含義：He did not come yesterday,so I did not tell him about it.
If he had not been ill and missed many classes,he would have made greater progress.
含義：He was ill and missed many lessons,so he did not make greater progress.
希望我的回答令你滿意