like: wie lang → →
wie lang ☊ 
bao lâu ☊ 
☊ wie lang ☊ 多久 ☊ duō jiǔ Er weiß nicht, wie lange er bei seinem Bruder bleiben möchte. ☊ Anh ấy không biết là mình sẽ ở chỗ anh trai bao lâu. ☊ (Lektion 20, Nr. 229) Wie lange bleiben Sie hier? ☊ Anh / Chị sẽ ở đây bao lâu? ☊ (Lektion 101, Nr. 1692) Wie lange bleiben Sie hier? ☊ Anh / Chị / Ông / Bà sẽ ở lại đây bao lâu? ☊ (Lektion 123, Nr. 2386) How long will it take to acquire the necessary skills? ☊ acquire ☊
How long ago did you buy it? ☊ ago ☊
What amazes me is how long she managed to hide it from us. ☊ amaze ☊
balance (on sth): How long can you balance on one leg? ☊ balance ☊
colour sth: How long have you been colouring (= dyeing ) your hair? ☊ colour ☊
The difficulty of a problem was defined in terms of how long it took to complete. ☊ define ☊
How much longer will this hot weather go on for? ☊ go on ☊
How long have Tom and Lucy been going out together? ☊ go out with sb, go out (together) ☊
How long can a human being go (= survive) without sleep? ☊ go without (sth) ☊
'How long did it last?' 'Oh, hours and hours.' ☊ hour ☊
judge how, what, etc...: It's difficult to judge how long the journey will take. ☊ judge ☊
The key is, how long can the federal government control the inflation rate? ☊ key ☊
How long does the play last? ☊ last ☊
How long is the course? ☊ long ☊
How long a stay did you have in mind? ☊ long ☊
How long is the River Nile? ☊ long ☊
How long have you been waiting? ☊ long ☊
How long have you been married? ☊ married ☊
measure how much, how long, etc...: A dipstick is used to measure how much oil is left in an engine. ☊ measure ☊
How long has he been in office? ☊ office ☊
How long has the import ban been in place? ☊ in place ☊
How long does it take to qualify? ☊ qualify ☊
How long is it since we last went to the theatre? ☊ since ☊
spend sth on sth: How long did you spend on your homework? ☊ spend ☊
study (sth): How long have you been studying English? ☊ study ☊
How long will it take her to swim the Channel? ☊ swim ☊
How long have you been living in this country? ☊ this ☊
How long is it to lunch? ☊ to ☊
We finally came to an understanding about what hours we would work. ☊ understanding ☊
Take a deep breath and see how long you can stay underwater. ☊ underwater ☊
How long have you been unemployed? ☊ unemployed ☊
How long does the journey usually take? ☊ usually ☊
How long have they been at war? ☊ war ☊
How long will you be staying in Paris? ☊ will ☊