Hi, I'm Roy and today I'm going to tell you the difference
between 'when' and 'if'.
Firstly, you can use 'when' or 'if' with the present simple
when it is a fact, or a repeated action.
'If or when you put water in the freezer,
it becomes ice.'
We use 'if' for unknown or possible situations
'If it rains today, I'll take my umbrella.'
We use 'when' to say we are certain something
is going to happen in the future.
'When I go home, I'll watch a film.'
Compare these two sentences:
'If I eat breakfast today, I'll have toast.'
I might not eat breakfast
'When I eat breakfast today, I'll have toast.'
I will eat breakfast
Anyway, that's everything for today.
I've got go because I'm hungry.
If I don't eat breakfast, I get grumpy.
Bye.