Student or Learner
She is always with him as if she is his girlfriend.
He had sex with fourteen girls during last 5 months, he must have affected with HIV positive.
Are these sentences correct?
Please help me.
Your second sentence is both grammatically and factually incorrect:
"Over/during the last five months he has had sex with 14 girls, so he must be infected with an STD [sexually transmitted disease] by now."