The basic form of
the verb is listed in your dictionary. It must not be confused
with the infinitive of the verb, which is prefixed with "to."
The simple present tense
usually looks like the basic form of the verb, but the two forms are not
the same. Adding -s- or
-es creates the third person singular
The simple past tense
is created by adding -ed. Irregular
past tense verbs do not end in -ed, but
usually differ in some way from the present tense or basic form.
The continuous participle
is created by adding -ing to the main verb.
The auxiliary verb is a form of the verb BE. Together, they create the
present and past continuous or progressive tenses. (The name, present
participle, is confusing because it has nothing to do with the present
tense. I like to call it the continuous participle.)
participle may carry the endings -en
or -ed, or it may be completely irregular.
These participle forms of the main verb combine with the auxiliary verb,
HAVE, to create the present and past perfect tenses; they also combine
with the verb BE to create passive voice. (The name, past participle, is
confusing because it has nothing to do with the past tense. I like
to call it the perfect-passive participle.)