The teacher will put "certain" on the board. Make sure the meaning is understood. Put "uncertain" on the board and imitate across with fingers to show they are opposites. Say: Are there other ways to say certain and uncertain? Elicit yes. Write each words in exercise 1 on the board one after the other. Every time a new word is written on the board, drill. Once every word has been written on the board, students will categorize them in pairs.

The teacher will form sentences with words in exercise 1. The teacher will write "to be convinced that", "to be doubtful about" etc. Drill. Students will then do exercise 2. Peer-checking then feedback.

Students will do exercise 3 individually. Feedback

Students are going to play a game to see how well they can lie and how certain they are about each other's honesty. Each student will have two cards. Before distributing the cards, the teacher will give the instructions of the activity. After the instructions, students will write 4 questions on each card, they will stand-up and talk to each other. Each student will choose 2 partners.

After the game, students sit back together and compare who they talked to and decide who was lying or telling the truth and why. Encourage them to use the vocabulary for showing certainty when they explain. Get some general feedback and then find out who was right.