1. i had eaten so much cakes yesterday that i had a stomache.
2.he has gone to the church because today is Sunday.
3. she had druck too much so she was ill.
4. my mum told me that after i have finished all my homework, i can watch TV.
5. the vase was broken down because of his careless.
6. i have seen this movie three times because it is a good movie.
Many grammatical mistakes...
5th sentense: It should be "carelessness" rather than "careless"
6th sentense: It should be to "WATCH a movie" but not to "SEE a movie". We should add "FOR" before "three times".
I have eaten my lunch already.
He was so drunk last night that he suffers from a severe headache today.
I watch television every night.
This glass is broken by Amy.
I have seen a ghost last night.