How many cows are there in the field?
I can see 5 cows in the field.
There are 5 cows in the field.
What can you see?
I can see cows and grass in the field.
How much grass can you see ?
There is a lot of grass!
How many + substantif pluriel
How many workbooks are there ?
How many workshops are there in Oliver Twist ?
How many children are there in Oliver Twist?
How many boys are there ?
How many minutes are there in one hour?
How many seconds are there in one minute ?
How much + substantif singulier
How much work is there ?
How much time is there left?
How much snow can you see in the school car park ?