UNIT 4 (English 6th grade)

In unit 4 the main grammar tense is the PRESENT PERFECT CONTINUOUS (also known as Present Perfect Progressive).

Here you have some online exercises for practising:

• http://learnenglishkids.britishcouncil.org/en/taxonomy/term/2078/all
• http://first-english.org/english_learning/english_tenses/past_perfect_progressive/05_past_perfect_continuous.htm
• http://www.perfect-english-grammar.com/present-perfect-continuous-exercise-1.html
• http://www.really-learn-english.com/present-perfect-progressive-exercises.html

And a game here:

http://www.eslgamesworld.com/members/games/grammar/perfectpast/New/present%20perfect%20continuous.html