帮我看下这些句子语法正确吗?that is our pen 那是我们的笔this is their dog 那是他们的狗

牙齿的复数是 teeth.类似的还有 goose → geese (复数,鹅.)
另外注意一下：
its = 它的
it's = it is = 它是
其他应该都对.(虽然很多个人共同拥有一支笔还满怪的...哈)
加油
喔对,有一个我不知道的...green tea 是可数的吗?
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刚去问了我妈妈...
一般说绿茶(包括茶叶) 都是用green tea,
如果用green teas 复数的话就是指不同 种类 的绿茶.
一样的有fruit 水果 和fish 鱼

牙齿的复数是teeth
its 应该是这样的，it's=it is
另外的话都没有语法错误，加油哦~

those are our pens.
that dog is theirs.
these green tea are hers.
tooth 的复数是teeth
Your name is Samin

those are our pens.
that is their dog.
these green teas are hers.
it's teeth are black .
your name is samin

teeth