Present Perfect Tense Concepts

To describe actions that are happening now.

To talk about actions that are always true.

To talk about actions where the time isn't important.

To describe future actions.

I have worked hard today.

I am working hard now.

I will work hard tomorrow.

I worked hard yesterday.

By using 'will' with the base form of the verb.

By using 'am/is/are' with the base form of the verb.

By using 'have/has' with the past participle of the verb.

By using 'was/were' with the base form of the verb.

He was called.

He has called.

He have called.

He is called.

To avoid using verbs.

To say things more quickly.

To make sentences longer.

To make sentences more formal.

I call.

I've called.

I had called.

I will call.

When the action is happening right now.

When the action is in the distant past.

When the action is planned for the future.

When the time of the action is not over.

Until and unless.

Before and after.

For and since.

During and while.

The visits happened only once.

The visits are planned for the future.

The visits happened repeatedly over time.

The visits are happening right now.

When talking about a current action.

When planning a future visit.

When describing a future event.

When asking if someone has studied a subject.