đã dùng đã sử dụng 
used like: đã sử dụng → →
Das Jahr in dem ich arbeitslos war, habe ich genutzt um mich weiterzubilden. ☊ 
Trong năm tôi thất nghiệp, tôi đã sử dụng thời gian để học thêm nghề. ☊ (Lektion 107, Nr. 1904) She used her family's history as a base for her novel. ☊ base ☊
a used car in perfect condition ☊ condition ☊
He used a false name to get the job. ☊ FALSE ☊
She used the money to go towards the foundation of a special research group. ☊ foundation ☊
He used the occasion to announce further tax cuts. ☊ occasion ☊
Police in riot gear used their powers under the Public Order Act to move on 300 protesters. ☊ power ☊
Have you used it recently (= in the recent past)? ☊ recently ☊
He used the very same (= exactly the same) words. ☊ same ☊
use sth for sth/for doing sth: We used a carrot for the snowman's nose. ☊ use ☊