Zero Conditional

Here we use a simple present in both clauses.

• If you give respect, you get respect.
• If you heat ice, it melts. 
• If I am late, my father takes me to school. 
• If he comes to town, we have dinner together. 

The Zero Conditional is used to talk about situations that are always true if something happens. They are also used to talk about general truths.

In most cases, it is possible to replace a zero conditional by a time clause using when.

• When you heat ice, it melts. 
• When I am late, my father takes me to school. 
• When he comes to town, we have dinner together.
• When you give respect, you get respect. 

Type 1 Conditional

Here we use a simple present in the if-clause and a simple future in the result clause.

§  If you want, I will talk to him.

§  If I see her, I will give her your love. 

§  If you finish on time, we will go to the movies. 

§  If it rains, the match will be cancelled. 

§  You will be late if you don't hurry up. 

§  I will buy a car if I get my rise. 

The Type 1 conditional refers to the present or future time. Here the situation is real and possible. It is used to talk about a possible condition and its probable result.