Why is That <e> There?
time
The <e> marks the <i> as a 'long' vowel.
sum
some
dance + er ➙
dancer
ear
noun
sleeve
No complete English word ends in <v>.
bear
bare
dance + ed ➙
danced
hand
both
teethe
The <e> marks the <th> as a voiced sound, or /ð/.
The <th> is not voiced in teeth.
tied
tide
dancing ➙
dance + ing
head
both
continue
No complete English word ends with <u>.
tents
tense
dance + able ➙
danceable
be
verb
buckle
The <e> has to follow a syllabic liquid <l> after a consonant.
This also applies to a syllabic liquid <r>, in British spelling, like centre.
sight
site, cite
dances ➙
dance + es
go
both