.全国公共英语考试语法let的用法1）当let后只有一个单音节动词，变被动语态时，可用不带to的不定式。They let the strange go.- The strange was let go.2）若let后宾补较长时，let通常不用被动语态，而用allow或permit代替。The nurse let me go to see my classmate in the hospital.- I was allowed / permitted to see my classmate in the hospital.全国公共英语考试语法一般现在时代替将来时时间状语从句，条件句中，从句用一般现在时代替将来时When, while, before, after, till, once, as soon as, so long as, by the time, if, in case (that), unless, even if, whether, the moment, the minute, the day, the yea
