like: As long as you → →
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You can borrow my car as long as you promise not to drive too fast. > You can borrow my car provided that you don't drive too fast. ☊ 
Cậu có thể mượn xe hơi của tôi miễn là cậu hứa sẽ không lái quá nhanh. > Cậu có thể mượn xe hơi của tôi với điều kiện là cậu không lái quá nhanh. ☊ I haven't known him as long as you (= as you have known him). ☊ as ☊
As long as you have your health, nothing else matters. ☊ health ☊
I've known her at least as long as you have. ☊ at least ☊
Stay as long as you like. ☊ long ☊
As long as you're happy, that's all that matters. ☊ matter ☊
You are welcome to come and stay as long as you give us plenty of notice. ☊ notice ☊