if

Don’t____ to let me know if there is anything I can do for you.

________ number of deaths from heart disease will be reduced greatly if people are persuaded to eat more fruit and vegetables.

It’s rather cold in here. Do you mind if I close the window? ____________.

If you prefer mild flavours reduce or __________ the chilli. 

If we ______ the plan you suggest, we are more likely to be successful.

--It's rather cold in here. Do you mind if I close the window? --_____________________ .

—It’s cold in here. Do you mind if I close the door? —                          .

---Is Peter there? ---______, please. I’ll see if I can find him for you.

Jack told Mary he ____some snacks to her house if he _____to see her on Friday night.

--If he _____that the mushroom was poisonous, he _____ it. --Luckily he was sent to the hospital immediately.