1. next day將來(lái)時(shí)
the next day一般過(guò)去時(shí)
2. by the end of +過(guò)去的一個(gè)時(shí)間過(guò)去完成時(shí)
by the end of +將來(lái)的一個(gè)時(shí)間將來(lái)完成時(shí)
e.g. By the end of last term, we had already learned 14 lessons.
By the end of next term, we will have learned 28 leassons.
3.once upon a time一般過(guò)去時(shí)
4. at one/the time 一般過(guò)去時(shí)
at a time 一般現(xiàn)在時(shí)
腦子里先想了這點(diǎn).