Relate the main characteristic of irregular verbs in...

Irregular verbs always add "-ing" to indicate the past tense form.

Irregular verbs follow a consistent pattern by adding "-ed" to form both the past tense and the past participle.

Irregular verbs modify their internal structure or remain unchanged in their past forms without following a regular pattern.

Irregular verbs change only in the thirdperson singular form in the present tense.