Principal+Parts

= Principal Parts of Verbs = All verbs have four principal parts: infinitive (base part), present participle, past, and past participle. Here are the principal parts of the regular verb walk: walk walking walked (have, has, had) walked
 * // infinitive, present participle, past, past participle //**

In English most verbs are regular, and their past and past participle parts end in " ed ."

=** Irregular Verbs **=

However, we have many irregular verbs which form their past and past participle irregularly. Notice the various ways that irregular verbs form their past and past participle parts.

begin beginning began (have, has, had) begun bring bringing brought (have, has, had) brought burst bursting burst (have, has, had) burst go going went (have, has, had) gone grow growing grew (have, has, had) grown think thinking thought (have, has, had) thought
 * // infinitive, present participle, past, past participle //**