this is a carrot.(改为复数形式)可以改成they're carrot吗? This is a carrot. （改成复数）

she is a factory worker\u6539\u4e3a\u590d\u6570\u5f62\u5f0f

\u56de\u7b54\u548c\u7ffb\u8bd1\u5982\u4e0b\uff1a
They are the factory workers.
\u4ed6\u4eec\u662f\u5de5\u5382\u7684\u5de5\u4eba\u4eec\u3002

This
is
a
carrot.
\uff08\u6539\u6210\u590d\u6570\uff09
\u662fThese
are
carrots
\u56e0\u4e3athis\u7684\u590d\u6570\u662fthese
carrot\u590d\u6570\u76f4\u63a5\u52a0s\u5373\u53ef
\u610f\u601d\u662f
\u8fd9\u4e9b\u662f\u80e1\u841d\u535c

这是错误的，应该改成These are carrots.
您犯了两个错误，①carrot是死物，用they不合适，this的复数是these，应该用these去表达；②既然是复数，carrot应变成复数形式carrots。

this is a carrot.(改为复数形式)可以改成they're carrot吗?
不好吧，因为this的复数形式是these，而且carrot的复数形式是carrots.
These are some carrots.

These are carrots.
carrot是胡萝卜。。。they一般是指人之类的，不太合适，而且This 的复数形式是These，同时is变are，carrot可数名词加s。

嗯，They're carrots. carrot是可数名词当然要加s。

They are some carrots.