单数句改成负数句it's a pencil.this is a tennis racket.is he your friend?the ruler is on the deskis that your hat
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单数句改成负数句it's a pencil.this is a tennis racket.is he your friend?the ruler is on the deskis that your hat
单数句改成负数句
it's a pencil.
this is a tennis racket.
is he your friend?
the ruler is on the desk
is that your hat
单数句改成负数句it's a pencil.this is a tennis racket.is he your friend?the ruler is on the deskis that your hat
it's a pencil.
they are pencils.
this is a tennis racket.
these are tennis rackets.
is he your friend?
are they your friends?
the ruler is on the desk
these rulers are on the desk
is that your hat
are those your hats?
They are pencils.
These are tennis rackets.
are they your friends?
these rulers are on the desk.
are those your hats?
they're pencils.
These are tennis rackets.
Are they your friends?
The rulers are on the desk.
Are those your hats?