注意:
在上列句構中, that子句中的主詞可往前移位置於句首, 而因時態之不同, 有下列變化。 主詞 + happen(s) to + 原形動詞
主詞 + happen(s) to + have + 過去分詞
a. 時態相同時, to之後接原形動詞。
例: It happens that he is here.
時態相同
= He happens to be here.
(他正好在這裡。)
It happened that he had some money.
時態相同
= He happened to have some money.
(他剛好帶了錢。)
b. 時態不同時, to之後接"have + 過去分詞"。
例: It happens that he was there. 時態不同
= He happens to have been there.
(他當時剛好在那兒。)
It happens that he knew it then.
時態不同
→He happens to have known it then.
(他碰巧當時知道這件事。) |