-Past partciples, especially irregular verbs.
-Present perfect and simple past
-Passive voice---> You want to do really good? Use the links and answer these exercises. Bring them to class and I'll help you :)
Past passive voice: http://www.ego4u.com/en/cram-up/grammar/passive/exercises?simple-past
Present continuous passive voice: http://www.ego4u.com/en/cram-up/grammar/passive/exercises?present-progressive
Present perfect passive voice: http://www.ego4u.com/en/cram-up/grammar/passive/exercises?present-perfect
-Present perfect (itself) in negative, affirmative and question form. Use this link to practice: http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises
-Changing sentences into affirmative, negative and question form.
- Since and for. Use this link: http://www.ego4u.com/en/cram-up/vocabulary/since-for
- Great, big, tall, large, and high.
- Little/ few. Use this link: http://www.ego4u.com/en/cram-up/vocabulary/little-few/exercises
I recommend to study this list of vocabulary. The words you don't know, use the internet or a bilingual dictionary.
Study hard and good luck!!!