they know waht each other are doingthey each know waht other is doing;they know what each is doingthey know waht they each are doing、这四句哪句是对的.解释说明错在那里

来源:学生学帮网 编辑:学帮网 时间:2024/06/20 20:55:07

they know waht each other are doing
they each know waht other is doing;
they know what each is doing
they know waht they each are doing、这四句哪句是对的.解释说明错在那里

they know what they each are doing正确,他们知道他们每个人在干什么?each做they的同位语

they know what each is doing是对的
其他的each后面没有加三单——“s”