(iv) You are doubtless very big. (Turn into negative)

(v) All sorts of things and weather must be taken together. (Voice change)

(vi) I am not so large as you. (Use positive degree)

(vii) You are not as small as I. (Change the degree)

(viii) Talents differ. (Rewrite using adjective form of 'differ')

(ix) I can't carry forest on my back. (Voice change)

Dear student,

(iv) There is no doubt that you are very big. (Turn into negative)

(v) We must take all sorts of things and weather together.

(vi) You are larger than me. (The given sentence is in positive degree, changed to comparative)

(vii) I am smaller than you.

(viii) There are different talents.

(ix) The forest can't be carried on my back. (Voice change)

Regards