when they are send the goods 这句话写的对么

when they are send the goods 这句话写的对么
when they are send the goods 这句话写的对么

when they are send the goods 这句话写的对么
不要are
when they sent the goods
用一般过去时
when they send the goods
也可以用一般现在时
当他们送货时,……

when did they send the goods
when will they send the goods