Question

7．只要你提前三个月预订，飞往悉尼的票价就会减半．
The air ticket to Sydney will be half priceas long as you book it three months earlier．

Answer 1

分析 as long as you book．

解答 答案：as long as you book．这里是说只要，用as long as引导的条件状语从句，遵循主将从现的规则，从句主语是you第二人称，故动词用原形book预定，故答案是as long as you book．

点评 as long as 有两个意思，一是用于本义，意为"与…一样长（久）"，在否定句中，也可说成 （not） so long as；二是用于引申义，表示"只要"，用于此义时也可说成 so long as（不管是肯定句、否定句还是疑问句）．如：This river is as long as that one．这条河与那条河一条长．He lived abroad as long as five years．他住在国外长达五年之久．He didn't stay there as[so]long as she．他在那儿住得不如她久．As long as it doesn't rain we can go．只要不下雨，我们就可以去