把下列句子變為複數 This is a watermlon. it is a yellow shirt. that's my watch.

把下列句子變為複數 This is a watermlon. it is a yellow shirt. that's my watch.

1、This is a watermlon.
These are some watermelons.
這些是西瓜.
2、It is a yellow shirt.
They are some yellow shirts.
它們是些黃色襯衫.
3、That's my watch.
Those are our watches.
那些是我們的手錶.