2 added 37 characters in body
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You can say: Here is a pen.

Here is a pen.

Think of giving a pen to someone right in front of you.

There is aOn the other hand:

There is a pen.

The pen - there could bedoes not have a pen anywherespecific location.

You can say: Here is a pen. Think of giving a pen to someone right in front of you.

There is a pen - there could be a pen anywhere.

You can say:

Here is a pen.

Think of giving a pen to someone right in front of you.

On the other hand:

There is a pen.

The pen does not have a specific location.

1
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You can say: Here is a pen. Think of giving a pen to someone right in front of you.

There is a pen - there could be a pen anywhere.