从一道高考题看when的运用 when是中学英语中一个非常活跃的词，其意义丰富，用法灵活，不易被大家掌握
高考试题经常涉及对when的考查
请看2004年北京春季高考单项填空第26题： We were swimming in the lake ______ suddenly the storm started
when B
while C
until D
before 此题考查的就是when的用法，从语境可知，该空表示“正在这时”，答案选A
下面结合高考试题对when的用法作一归纳，希望对同学们有所帮助
一、when可以用作从属连词，引导时间状语从句，意为“当„„的时候”，从句的谓语动词可以是延续性的（此时相当于while）,也可以是非延续性的
其引导的时间状语从句通常用现在时表示将来 [真题再现] 1
—He was nearly drowned once
—When was ____
—______ was in 1998 when he was in middle school
(2002北京春招) A
that; It B
this; This C
this; It D
that; This 2
The reporter said that the UFO_______ east to west when he saw it
(NMET2000) A
was traveling B
traveled C
had been traveling D
was to travel 3
—Can I join your club, Dad
—You can when you _____ a bit older
(NMET1994) A
will C
are getting D
will have got 4．
