英语造句。帮忙造三句现在完成时态的句子。简单即可。懂英语者。

I have studied here since June.
They have been married for five years.
Have you had lunch?

he has just finised the work
mum was just cooking in the kitchen
i just went out with my dog.

I have gone to Jilin.
He has finish his homework
I have been there before.

I'm answering your question.
My computer is working.
My stomache is screaming.

I have visited my best friend already.