Unitat 23

Present perfect review

The present perfect simple and the present perfect continuous are both used to express that an action began in the past and is still going on or has just finished.

Contingut exercicis

In many cases, both forms are correct, but there is often a difference in meaning. We use the present perfect simple mainly to express that an action is completed or to emphasise the result. We use the present perfect continuous to emphasise the duration or the continuous course of an action.

 

Present perfect simple

Have/has + past participle → They have lived together for nearly fifty years.

Present perfect continuous

Have/has + -ing → It has been raining for hours.

Situation Present perfect simple Present perfect continuous
If you want to express what has happened so far (result). x
If you want to express how long an action has been going on (duration). x
If you want to emphasise the completion of an action (completion). x
If you want to emphasise the duration of an action (duration). x
If you want to express that a completed action led to a desired result (desired result). x
If you want to express that a completed action had an unwanted side effect (unwanted side effect). x
In negative sentences: if you want to express how much time has passed since the last time the action took place (since the last time). x
In negative sentences: if you want to express how much time has passed since the beginning of the action (since the beginning). x
Usually, if an action is still going on and we want to express that it is a permanent situation (permanent). x
Usually, if an action is still going on and we want to express that it is a temporary situation (temporary). x
 

Exercici 1

Respon a les següents preguntes per avaluar el que has après.

Exercici 2

Respon a les següents preguntes per avaluar el que has après.

Exercici 3

Respon a les següents preguntes per avaluar el que has après.