Elementary Grammar Exercise

We form the Past Simple of regular verbs by adding -ed to the verbs:

walk-->walked
watch--watched
open-->opened
ask-->asked

Some exceptions:

1) verbs ending with -e, adding -d:
live-->lived
like-->liked

2) verbs ending with a consonant and -y, replacing -y with -ied:
apply-->applied
try-->tried

3) most verbs ending with one vowel and one consonant, doubling the vowel:
stop-->stopped
plan-->planned

4)Many verbs have an irregular Past Simple form:
do-->did
have-->had
take-->took
buy-->bought
come-->came
stand-->stood
find-->found
ring-->rang
go-->went
say-->said
fly -->flew