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t rain C. isn39。t; isn39。t protect the earth. A. until B. before C. though D. if 點(diǎn)撥: 考查 if引導(dǎo)的條件狀語(yǔ)從句。t hurry, we39。ll go to see you if I have time. They will have a piic unless it rains next Sunday. 原因 狀語(yǔ) 從句 because, since, as,for He didn39。t rain D. rains 4. — Come and join us, Betty! (2020, 宜賓 ) — I39。m afraid I can39。t catch the first bus because he got up too late. We should study hard since we are students. 目的 狀語(yǔ) 從句 so that, in order that Please say it in a loud voice so that everyone can hear it. 結(jié)果 狀語(yǔ) 從句 so that,so? that/such? that It39。ll miss the train. = Hurry up, or we39。句意 “ 如果我們不保護(hù)地球 , 我們將沒(méi)有水喝。t C. won39。t raining D. doesn39。t rain B. didn39。t; will be B. won39。 【 例 3】 We will have no water to drink _ D __ we don39。如: If we don39。ll e to see you as soon as I arrive there. 條件 狀語(yǔ) 從句 if, as long as, unless I39。t rain B. will rain C. doesn39。39。s so hot that we want to go swimming. It is such a heavy box that nobody can move it away. 讓步 狀語(yǔ) 從句 though/although, even if, whenever,whatever Though