How do you feel vs. What do you feel

[forinfo]

Hello,

I have been wondering which expressions are correct and I'd be grateful for your help.

1. How do you feel about the event?
What do you feel about the event?

2. What do you say this in English?
How do you say this in English?

3. It is a bad habit to speak ill of others.
It is a bad habit speaking ill of others.

As to the third one, I heard either one is fine,
but I wonder which one is a more common expression.

[emsr2d2]

Hello,

I have been wondering which expressions are correct and I'd be grateful for your help.

1. How do you feel about the event?
What do you feel about the event?
Both are used though with the second "What do you think about the event?" would be an improvement.

2. What do you say this in English?
How do you say this in English?
Only the second is correct. You can say "In this situation, what do you say in English?" but without the word "this" after "say".

3. It is a bad habit to speak ill of others.
It is a bad habit speaking ill of others.
The first is more common. The second could be used but would be much better if reversed to "Speaking ill of others is a bad habit".

As to the third one, I heard either one is fine,
but I wonder which one is a more common expression.

See above.

[forinfo]

Thank you very much for your reply.