Grammar focus

• If+Present Simple+Present Simple (zero conditional)

If you have an important decision to make, it is more difficult.

• If +Present Simple+will (first conditional)

If the trend continues, this figure will double in the next ten years.

• If+Past Simple+would (second conditional)

If you wanted to buy a house ,.....you'd be able to.

1 a probable situation in the future (real) (First conditional)
2 a less likely or hypothetical situation (unreal) (Second conditional)
3 a habit or general truth (real) (Zero conditional)

Examples:
1 If I go to excursion, I feel happy.
2 If I cook today, we will have lunch at noon
3 If I went a trip abroad, I would go to Paris.