Read Collins Cobuild English Grammar Online
Authors: Collins
R66
In British English, when a two syllable verb ends in a single vowel letter followed by a single
l
, the
l
is doubled before
ing
or
ed
is added to it, even if there is no stress on the last syllable.
travel | travelling | travelled | ||
quarrel | quarrelling | quarrelled |
A few other verbs also have their final consonant letter doubled.
program | programming | programmed | ||
worship | worshipping | worshipped | ||
hiccup | hiccupping | hiccupped | ||
kidnap | kidnapping | kidnapped | ||
handicap | handicapping | handicapped |