你獨自一人在教室里多長(cháng)時(shí)間了？
How long were you by yourself in the classroom?
做這項工作需要多長(cháng)時(shí)間？
How long will the job take?
安裝電話(huà)機與總機接通要多長(cháng)時(shí)間？
How long will the connection of the telephone take? ie How long will it take to install a telephone and connect it to the exchange?
自從我們看望你母親以來(lái)到現在有多長(cháng)時(shí)間了？
How long is it since we visited your mother?
我回憶不起來(lái)多長(cháng)時(shí)間了。
I can't recall how long it has been.
你能瞪著(zhù)看多長(cháng)時(shí)間不眨眼？
How long can you stare without blinking your eyes?
到那兒要多長(cháng)時(shí)間？
How long will it take me to get there?
