when
I was just reading a book when she came into my room. 她走進(jìn)我房間時(shí),我正在看書.
while
While Jim was mending his bike, Lin Tao came to see him. 正當(dāng)吉姆修自行車時(shí),林濤來看他.
before
They had hoped to be able to arrive before ten. 他們本來打算能在10點(diǎn)之前到達(dá).
after
It can help people to catch bad people and look after people's children or house.它可以幫助人們抓住壞人,幫助照顧人們的孩子或房子
as
come here late as there is no bus around
我來遲了因?yàn)楦浇鼪]車
until
Continue in this direction until you see a sign. 一直朝著這個(gè)方向走就看見指示牌了

till
Don't open it till your birthday. 等到你過生日那天再打開.
as soon as
I’ll write you as soon as I get there. 我一到那兒就給你來信.