I work very hard whenever there is a need:

I wear a pad every time I bat:

(i) I batted.

(ii) I didn't bat.

(iii) I wore a pad.

(iv) I didn't wear a pad.

I get cold feet whenever I see a lion.

(i) I saw a lion.

(ii) I didn't see a lion.

(iii) I got cold feet.

(iv) I didn't get cold feet.

Whenever Devdas comes, Umrao Jaan sings.

(i) Umrao Jaan is singing.

(ii) Devdas has come.

(iii) Devdas hasn't come.

(iv) Umrao Jaan is not singing.

I can see the star only if I go to the planetarium.

(i) I went to the planetarium.

(ii) I didn't see the star.

(iii) I saw the star.

(iv) I didn't go to the planetarium.

I can find Chinese toys only if I go to the fair.

(i) I didn't find Chinese toys.

(ii) I found Chinese toys.

(iii) I went to the fair.

(iv) I didn't go to the fair.

I will befriend Som only if he returns my book.

(i) I befriended Som.

(ii) Som returned my book.

(iii) I won't befriend Som.

(iv) Som didn't return my book.

Only in Bengal, you can see the Bengal Tiger.

(i) You went to Bengal.

(ii) You didn't go to Bengal.

(iii) You saw the Bengal Tiger.

(iv) You didn't see the Bengal Tiger.

You cannot clear the CAT unless you are hard working.

(i) You are hard working.

(ii) You can clear the CAT.

(iii) You are not hard working.

(iv) You cannot clear the CAT.