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nless引導(dǎo)的從句放在主句之前時(shí) ,要用逗號(hào)將從句與主句隔開。. Unless you get up early, you won’t catch the early bus. Unless it rains tomorrow, I will go to the beach for a piic. Unless you speak English every day, you can’t improve it quickly.4) unless相當(dāng)于 if …not, 可以互相替換。. Unless he studies hard, he won’t catch up with others.If he doesn’t study hard, he won’t catch up with others.He won’t leave his home unless his parentsagree.He won’t leave his home if his parents don’t agree.Finish Part B on page 48.Homework :Go over the use of “ although” and “unless”.