a- Spelling:

1- When the simple form ends in ( s,z,ch,sh, or x)
add (es)

* box ---- boxes
* wish ---- wishes

2- When the simple form ends in (o) preceded by
a consonant, add (es).

* tomato ---- tomatoes
* mosquito --- mosquitoes

3- When the simple form ends in (f , or fe) change
the (f , or fe) to (v) and add (es).

* leaf ---- leaves
* wife ---- wives

4- When the simple form ends in preceded by
aconsonant, change the to (i) akd add (es).

* party ---- parties
* library ---- libraries

5- In all other cases add (s) to the simple form.

* friend ---- friends
* studio ---- studios
* day ---- days


best wihses,,