He has a red wseater改为复数是怎么样的

全部改复数的话是
THEY HAVE RED SWEATERS.
如果只是对SWEATER改的话
就是HE HAS RED SWEATERS.

He has some red wseaters

wseater打错了吧。应该是sweater，后面加s就是复数

全部改复数的话是:They have red sweaters；如果只是对sweater改的话就是He has red sweaters.

they have red sweaters

首先我想说，最后一个单词是不是打错了，应该是sweater吧，至于你说的改成复数，什么意思呢？全部都改成复数还是某些部分改？
全部变成复数的话:They have many red sweaters.
某部分变动:1.He has many red sweaters.
2.They have a red sweater.
你根据题意自己选择吧...

They have red sweaters.题目没有要求将某个地方改为复数形式，那就要把整个句子改为复数形式。