1 .if he is hard working ,he will get good marks 2.if he takes these pills, he will be better 3.unless someone doesn't put the coal in,the fire won't go out 4 She advised me not to buy that coat
1, Be hard working or you won't get good marks.
=> If he...isn't hard-working, he won't get good marks...
2,Unless he takes these pills, he won't be better.
=> If ..he doesn't take these pills, he won't be better..
3,If someone doesn't put the coal in,the fire will go out.
=> Unless.someone puts the coal in, the fire will go out...
4,"If I were you,I wouldn't buy this coat" she said
=> She advised.me not to buy that coat..
