I see these a lot. If I say....
I see these a lot.
1.Since when are you here?
2. Since when are you so shy / stingy / jealous? / emotional?

If I say;
1.How long have you been here?
2. Since when have you been so shy / stingy / jealous? / emotional?

Are they OK?

Question

I see these a lot. If I say....
I see these a lot.
1.Since when are you here?
2. Since when are you so  shy / stingy / jealous? / emotional?

If I say;
1.How long have you been here?
2. Since when have you been so  shy / stingy / jealous? / emotional?

Are they OK?

Answer

yes they are ok