I) 

1) Green ⇒ Green's

2) farther ⇒ more

3) interestinger ⇒ more interesting

4) wonderfuller ⇒ wonderfull

5) eldler ⇒ older

6) as ⇒ than

7) as ⇒ than

8) than ⇒ from

9) niore ⇒ ∅

10) more ⇒ most

II) 

1) I've never taken such a memorable trip before.

2) He is the most interesting person I have ever talked to.

3) My mother is the most hard-working person.

4) Jolin is the hardest worker in this factory.

5) Is this the cheapest computer you have got?

6) I can't sing as beautifully as her.

1) more beatiful=> the most beautiful

3)interestinger => more intersesting

4) wonderfuller => wonderful 

5) elder =>older

6) as => than

7) a bigger city => as big city as

8) very => more

9) more => Bỏ

10) more => most

1) I've never taken to any trip more memorable than this. 
2) He is the most interesting man I've ever talked. 
3) My mother is the most hard working.

4) John is the hardest worker in this factory.

5) Is this the cheapest  computer have you got?
6) I can't sing much more beautifully than her.