Once引导时间状语从句的情况
问题描述：
Once引导时间状语从句的情况
如果逐句和从句的主语一致,可以把从句的主语和be动词省略,那如果从句为一般现在时没有be动词呢,如果是有助动词和情态动词时怎么省略?
答
你说的4种情况分别如下：1.Once you are in America,you will know how developed the country is.Once in America,you will know how developed the country is.2.Once you climb onto the top of the mountain,you...