color[yellow][#píu píu#]
1.Unless he does have money,he will buy that car
2.Unless he does watch tv tonight,he won't play table tennis
3.Unless she doesn't work hard,she won't be tired
4.Unless he does carry a heavy thing,he won't go quickly
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Unless sẽ đối nghĩa với If
Nếu if là khẳng thì Unless là phủ
Nếu If là phủ thì Unless là khẳng
$$Unless + S + V(s/es), S + will + Vinf$$
$$If + S + V(s/es), S + will + Vinf$$