de past continuous in bevestigende zinnen

Welke zin is correct?
1. He was walk home.
2. He walking home.
3. He was walking home.
Welke zin is correct?
1. Susan was sing.
2. Susan was singing.
Welke zin is correct.
1. They walking to school.
2. They were walking to school.
Welke zin is correct?
1. Peter and Jim is playing the guitar.
2. Peter and Jim were play the guitar.
3. Peter and Jim playing the guitar.
4. Peter and Jim were playing the guitar.
Welke zin is correct?
1. He was smoking a cigarette.
2. He was smoke a cigarette.
3. He smoking a cigarette.
Welke zin is correct?
1. The sun was shining.
2. The sun was shine.
3. The sun shining.
4. The sun shine.