complete with the right tense of the verbs in backets:

if i have time i (cook) something
the baby will stop crying if she (feed) him.
if the computer (crash) i wont finish my essay.
if it stops moving we (go) out and play .
jem (not go) to the movie if he doesn t finish his homework.
we won t go to the concert if it he (not buy) tickets.
the flowers (die) if you don t water them.