Enter the -ing form of the given verbs and then click on "Check answer". If you need help, click on "Give me a letter" to get a free letter (but you'll lose points). Click on the arrows <= and => to move between the questions. If you make a mistake, please try again until you find the correct answer. You needn't answer the questions in the given order but you must answer them all correctly to complete the exercise.
Exercise written by Elek Mathe - EnglishLearner.com - last modified on September 02, 2010