My brother is singing_____my sister is dancing填whiel还是when为什么?

来源：学生作业学帮网 编辑：学帮网 时间：2024/05/26 20:32:39

My brother is singing_____my sister is dancing
填whiel还是when
为什么?

当两个句子都是进行时的时候,用while表示同时进行.
当一个是进行时另一个不是的时候,while和when都可以表示当.
比如He came in when/while I was reading.当我正读书的时候他进来了.

while. when 后一般不带进行时

while 表示两个动作同时进行，而WHEN没有这种用法

while.她后面加ing

my brother is [tall] My u_______ is my mother is brother. My brother is OK.=My brother is ___ ___. My father is your brother She is my brother , Nancy My brother is ( ) ( ) his clothes my brother is crazy( )football My brother is looking___his photos. what is my brother like? My brother is taking pictures That () Paul.()is my brother the baseball is ( )my brother A baseball is ( )my brother. my brother is wedding day This man is (my brother).对my brother部分提问 The boy is my brother.(就my brother 提问) The boy is my brother 对my brother提问 He is my brother.对my brother提问