The First Conditional

Compare the following two sentences:

A.  If you call me I come.
B.  If you call me I will come.
Both sentences seem to suggest that an action will take place, if a certain condition is met.
That's what they have in common.

There is a difference though, in a way that sentence A seems to express a sort of general rule, a principle that the speaker adheres to. 

In sentence B the speaker merely states an intention (what is likely to happen). 

We use the 1st Conditional in offers, suggestions, warnings and threats.

Examples: If we hurry (present simple), we will catch the bus.

                        If we miss it, there will be another one

                                      Try the exercise below the text on the learn4good page.