English verbs have very few forms. Most verbs are REGULAR and have four forms. It is easy to make these forms because they all change in the same way. But some important verbs are IRREGULAR, and we make their forms in different ways. Only the verb be (Lesson 16) has more than five forms.
This is the form you can find in a dictionary.
EXAMPLES: work/ hurry/ do/ live/ have/ cut
HOW TO FORM IT: Add s
PROBLEMS: Verbs ending in ch/ sh/ o/s / y/ z change spelling (Lesson 91).
EXAMPLES: works/ lives/ cuts/ hurries/ has/ does
HOW TO FORM IT: Add ing
PROBLEMS: Verbs ending in e or 1 vowel + 1 consonant change spelling (Lesson 92).
EXAMPLES: working/ living/ cutting/ hurrying/ having/ doing
HOW TO FORM IT: Add ed
EXAMPLES: worked/ lived/ hurried/ cut/ had/ did
HOW TO FORM IT (REGULAR VERBS): With regular verbs, use the same as the past form (ed).
EXAMPLES: worked/ lived/ hurried/
HOW TO FORM IT (IRREGULAR VERBS): Irregular verb forms are sometimes the same as their past forms and sometimes different (Lesson 96).
EXAMPLES: cut/ had/ done