Such verbs work like this: Verb 3rd person singular present tense 3rd person singular past tense past participle present participle laugh he/she laughs he/she laughed laughed laughing love he/she loves he/she loved loved loving boo he/she boos he/she booed booed booing Present tense formation In the, the basic form of a regular verb only changes in the 3 rd person singular, as follows: Most verbs just add - s to the basic form (e.g. Take/takes, seem/seems, look/looks). Verbs that end with a vowel other than e add - es (e.g. Go/goes, veto/vetoes, do/does). Verbs that end with -s, - z, -ch, - sh, and -x add -es (e.g. Kiss/kisses, fizz/fizzes, punch/punches, wash/washes, mix/mixes).