They cannot use this system. ☊ 
Họ không thể dùng hệ thống này. ☊ Abstract Objects 1 like: They can → →
They need a leader they can believe in. ☊ believe in sb ☊
They can't have children. ☊ child ☊
If they can't get it to us in time, we'll just have to do without. ☊ do without (sb/sth) ☊
They can't be coming or else they'd have called. ☊ or else ☊
The project will only go ahead if they can raise the necessary finance. ☊ finance ☊
It's hard to see how they can lose. ☊ hard ☊
We haven't found a home for all our books yet (= a place where they can be kept). ☊ home ☊
Dreams are open to interpretation (= they can be explained in different ways). ☊ interpretation ☊
We encourage all students to work at their own pace (= as fast or as slow as they can). ☊ pace ☊
He is quietly confident that they can succeed (= he is confident, but he is not talking about it too much). ☊ quietly ☊
I've got some calls to make but they can wait until tomorrow. ☊ wait ☊