Writing emails - Asking a colleague to do something

1. ❌ you think you could help me with organising the conference?
2. I ❌ be grateful if you could send it today.
3. Do you think you ❌ help with the presentation?
4. I would be ❌ if you could come to the meeting.
5. I would be grateful ❌ you could send me the report.
6. Thanks very much ❌ your help.

Do
Do
would
would
could
could
grateful
grateful
if
if
for
for