Present perfect and other tenses

EXTRA: Irregular verbs with their pronunciation: http://www.spokenenglish.org/talkbr04.html

Hi,

here you have some more exercises:

a memory helper:
http://www.englishpage.com/verbpage/presentperfect.html

exercises
http://www.better-english.com/grammar/presentperfect1.htm
http://www.better-english.com/grammar/pspp1.htm
http://www.englishpage.com/verbpage/verbs5.htm

Now write 4 sentences in present perfect using

"yet":
"just":

Write one with "still" in any tense.

If you finish, go to this: http://www.englishpage.com/verbpage/presentperfectcontinuous.html
and this: http://www.englishpage.com/verbpage/pastperfect.html