1) He returned not long ago.
他不久前回来了。
2) He replied in an instant.
他不久就回复了。
3) Is he back now?
他回来了吗？
4) How long have he been back from abroad?
他回国多久了？
5) Perhaps he isn't coming.
他许不来了。
6) She should be back before long.
她不久就回来。
参考词条