解析:在"祈使句+and/then+陈述句"这个结构中,前面"祈使句"相当于if引导的条件句,表示"要是……(就会)",表示该条件一旦实现,必然出现某一结果。但如果表示"该条件实现不了,会出现什么结果"时,则用"祈使句+or/or else/otherwise+陈述句"。如:Hurry up, or you will be late for class.快点儿,要不然上课就迟到了。 真题回练 1. ______ it with me and I'll see what I can do. A. When left B. Leaning C. If you leave D. Leave 2. ______ blood if you can and many lives will be saved. A. Giving B. Give C. Given D. To give 3. ______ some of this juice, perhaps you'll like it. A. Trying B. Try C. To try D. Having tried Key:1-3 DBB 四、考查省略句中条件概念的表达法 典型题例 Unless ______ to speak, you should remain silent at the conference. A. invited B. inviting |