Измените предложения используя present perfect 1. i am inviting them for dinner. 2he is seeing her home. 3they are drinking tea. 4 i am buyin a present for my mother . 5 he is stopping a taxi

I have invited them for dinner.
2. He has seen her home
3. They have drunk tea
4.I have bought a present for my mother
5.He has stopped a taxi