Comparative and superlative

Here you can find some information with exercises on comparative and superlative. Here is the key to the exercises.

Relative, -ed and -ing clauses

Here you can find some exercises on relative, -ed and -ing clauses along with the key.

Active and passive voice

Here you can find some information and exercises on passive vs. active voice.

Object and subject questions

Here you can find some information with exercises on subject vs. object questions.  Here you can have access to the key for the exercises.

Here you can have access to a webpage with more exercises on the topic.

Lean on Me

Here you can find the video of the song  called "Lean on Me" with lyrics.

Both irregular and regular verbs

Here you can find the short list of verbs, which can be used as both irregular and regular.

Simple past and present perfect

Here are some exercises on simple past and present perfect:

http://www.englishpage.com/verbpage/verbs5.htm

http://www.englishpage.com/verbpage/verbs6.htm