happen過去式是happened，happen是不及物動詞,作“發(fā)生”解時,可指偶然的事故,也可指有計劃或無計劃發(fā)生的事。一般以事件、環(huán)境、形勢等作主語,表示“某人發(fā)生某事”時,須以介詞to 引出“某人”。

happen的過去式例句

1.Mechanization happened years ago on the farms of Islay.

數(shù)年前，艾萊的農(nóng)場就實現(xiàn)了機械化。

2.It happened at Stamford Bridge one murky November afternoon.

這發(fā)生在11月一個陰沉的下午，斯坦福德橋上。

3.Her son used sign language to tell her what happened.

她兒子用手語告訴她發(fā)生了什么事。

4.Elaborate efforts were made to reconstruct what had happened.

為重現(xiàn)當(dāng)時的情景，他們做了大量細致的工作。

5.An investigation is underway to find out how the disaster happened.

調(diào)查已經(jīng)展開，以查明災(zāi)難是如何發(fā)生的。