Forms of Past Simple and Present Perfect Tenses

How do we form Past Simple?

We put "-ed" to the end of the verb or use an irregular verb.

For example...

I played football yesterday.

I ate spaghetti last night.

How do we form Present Perfect?

We use have or has as a helping verb and a regular (verbs which take -ed ending) or an irregular verb. The short form is 've for have and 's for has.

For example...

I've never played rugby.

She's eaten spaghetti.