Present Perfect Tense

One of the harder tenses to master, we can use present perfect to talk about actions that 1. began in the past and continue until today (example: I've lived in Chicago for 10 years.) 2. unknown time frame. (example: I've been to China.) or 3. repeated actions in the past (example: I've seen many good movies lately). In order to form the present perfect, you need the helping verb have or has and the past participal of the verb (the 3rd form).

For a video doing a good job of explaining the form and uses of Present Perfect, click here:

https://www.youtube.com/watch?v=ODt_xD5OhK8

For more practice, click on these links:

http://www.englishgrammarsecrets.com/presentperfect/menu.php

http://www.agendaweb.org/verbs/present_perfect-exercises.html

http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple

PAST PERFECT

For a video explaining the past perfect tense, check out this video:

Past Perfect is somewhat simpler, it is used to discuss an event that happened before another event, both in the past; as in this example: I had studied English before I came to the US

https://www.youtube.com/watch?v=9QU5bqql8Kg

For more practice, click on this link and explore:

http://www.agendaweb.org/verbs/past_perfect-exercises.html