Why does "slapen" not have a double p in the middle, and other verbs like heb -> hebben get a double consonant?
It depends on whether the vowel is long or short.
Take a look at the Dutch spelling rules, there is a section on consonant doubling and long/short vowels.
Why is 'wij slapen' = we sleep and 'wij lopen' = we are walking. Instead of we walk?
wij slapen = we sleep or we are sleeping
wij lopen = we walk or we are walking
Infinitive 1st 2nd 3rd Person Plurals • Slapen - ( To Sleep - Present Tense Verb ) • 2nd 3rd Person Singular • Slaapt • 1st Person Singular • Slaap
We are slurping...stupid autocorrect!
Out of curiosity, what is Dutch for "slap" if "slaap" is taken?
"slaan" or "klap geven"