Ahoj Ema,
píšem iba to, čo podľa môjho vedomia a svedomia treba opraviť:

1. - ...I can see. ...You have probably eaten...
2. - ...he is just leaning...
5. - ...have gone up...
6. - ...I am going to pack...(plan, intention)
7. - ...had taken...so he has borrowed...
10. - ...have raised...after they had seen...
11. - ...When did it happen?
12. - ...has she been writing...has she published...
13. - ...stole...
14. - ...I have forgotten...
15. - ...he was going (sequence of tenses - posúvanie časov)
16. - ... was flying...she has never flown before...
17. - ...have you smoked...I am having...
18. - ...had borrowed... keys were missing... (sequence of tenses)
19. - ...have you been doing...
20. - ...we are having a picnic... (arranged)
21. - ...have landed...

Zdraví Dagmar

Ahoj Zuzka (prepáč, nie Ema),

pokračujem:

Vety na preklad:
1. - The meat must have gone bad because the whole kitchen is stinking after it.
2. - We want to have a designed shelf setup (system) made in our living room.
3. - Be just like (at) home and help yourself to some cake (biscuit) at last (at length), our daughter has made it herself.

Zdraví Dagmar

6. ja by som dala.. I will pack... (mne to príde ako náhly nápad, nie plánovanie)

preklad:
2. We want to have done a custom shelfing system in our living room.
3. Feel like at home and finally have a cake. Our daughter has baked it herself.

1. ... the whole kitchen smells of it.
3. Please make yourselves comfortable and help yourselves (do have) some cake please.
2. We are going to get custom made built-in shelves made for our living room.