Which of these are correct:
1-The models you learnt to build in Japan are nice.
2-The models you learnt to build from John are nice.
3-The models you learnt how to build in Japan are nice.
4-The models you learnt how to build from John are nice.
5-The models you learnt in Japan how to build are nice.
6-The models you learnt from John how to build are nice.
