By how they wear their hair. Jk. You can't really tell by appearance but it wouldn't be a bad idea to see how she interacts with guys. And from there, instincts.
Ask
You ask her.
every girl is at some state of their life
There are no signs that a girl is a virgin, you'd only know if you asked her. There is no clear definition of what makes a virgin. Virginity is about valuing women who have not had sex.
No.
No, there is no way to know if a woman is a virgin by examination.
You don't know unless she tells you. Or if she's pregnant or not.
Simply ask her.
if he wont have sex with his girlfreind
by never having intercourse
Not unless ur a doctor, the average person won't know. Or if u had sex with enought virgin to know by experience.
You really can't know for sure. A person may be a virgin and not bleed, you kind of just have to trust what they say. Generally if they are a virgin though, sex for the first couple of times will be painful. If it's not, the girl is probably not a virgin.