Summary:
Most of the time +s
- Dog - Dogs
 
- Teacher - teachers
 
Word ends with an f(e) then     f=ves
- Leaf - Leaves
 
- Wife - Wives
Sometimes when a word ends with y -  then y=ies
- Party - Parties
 
- but Boy - Boys
 
Let op medeklinker!
Word ends with S sound +es
- Coach - Coaches
 
- Box - Boxes