is,who,the,window,cleaning连词成句

is,who,the,window,cleaning连词成句
is,who,the,window,cleaning（连词成句）
You are doing your homework(用“I”作主语改句子）
Look!A boy______(swim) in the pond.(用动词的适当形式完成句子）
Number 5 is in the shower.这句话可用现在进行时结构来表示___________________