[fface]

Hi,
Can I also use 'yet', 'however' and 'still' instead of 'but' without changing the meaning in these examples?

1.He is a doctor, but/yet he is not kind.
He is a doctor. However/Still, he is not kind.

2.He is poor, but/yet he is happy.
He is poor. However/Still, he is happy.

3.She is naughty, but/yet she is not happy.
She is naughty. However/Still, she is not happy.

4.Is Mike tall?
Yes, he is tall, but/yet he is thin.
Yes, he is tall. However/Still, he is thin.

5.It is a fat dog, but/yet its owner is thin.
It is a fat dog. However/Still, its owner is thin.

Thank you very much for your reply.