Now this verb does change in the present when the subject is he, she, or it. The verb cost is cost in the present, cost in the past, and cost in the past participle, which is what we use with the present perfect.
I’ve seen a lot of students make the mistake of writing a sentence like this: Today I’m going to teach you all about some special irregular verbs in English that don’t change from present to past and past participle. Hello students, it’s Shayna, your teacher from. Advanced English Grammar Course Transcript:
