lesson 1/2018 »

unit 1
Grammar: hiphens
Grammar: review of present tenses

Questions, problems

pronunciation:
veneer
government
suit
suitable
kept

phrase:
so on
I went for a quick drink and so on.

has yet to
is yet to
Mexico has yet to agree to pay for the wall.
Mexico is yet to agree to pay for the wall.

it is a rule: when in three final letters of a verb are: consonant - vowel - consonant we double the final consonant adding form ing or ed.
Why is the form -ing happening in verb happen?