### If the shoes get old, then he will need new ones...

### If he keeps running more, then the shoes will get old

### If he wants to run, then he will keep running more

### If he wants to do something, then he will want to run

### If he gets bored, then he will want to do something

### If he needs to wait, then he will get bored

### If they need to dry, then he will need to wait

### If he washes them, then they will need to dry

### If they get dirty, then he will need to wash them

### If he keeps running in them, then they will get dirty

### If he decides he likes them, then he will keep running in them

### If he runs in them, then he will decide if he likes them

### If he ties them, then he will run in them

### If he puts them on, then he will tie them

### If you give a runner shoes, then he will put them on

### If you give a runner shoes