This are my sister That is his grandpa
These are her sons
Those is our daughter

я правильно сделала ?

1) These are my sisters

2) правильно✔️

3) правильно ✔️

4) This is our daughter

This-эта, That- та (един.число)

These-эти, Those-тех(множ.число)

These are my sisters.

That is his grandpa.

These are her sons.

This is our daughter.