2 To present/revise conditionals
• Read through the theory and explain that we form a type 1 conditional with if/wfien + present simple + will/сап + infinitive without to and that we use it to talk about a situation that is possible in the future. Point out that 'unless' means 'if not'.
• Explain that we form a type 2 conditional with if/when + past simple + would + infinitive without to and that we use it to talk about an unreal situation in the present/future.
• Explain that we form a type 3 conditional with if/when + post perfect + would have + past participle and that we use it to talk about an unreal situation in the past.
• Read out the examples and explain the use of the comma.
3. To practise conditionals
• Explain the task and ask two Ss to model the example.
• Give Ss time to complete the task in closed pairs.
• Monitor the activity around the class and then ask some pairs to ask and answer in front of the class.
Suggested Answer Key
1 A: What will happen if the factory closes down?
B: If the factory closes down, 300 people will lose their jobs.
2 A: What will happen if we vaccinate all the children? B: If we vaccinate all the children, they won't get
sick.
3 A: What will happen if someone gives her a job?
B: If someone gives her a job, she won't be homeless.
4. To practise conditionals
• Give Ss time to put the verbs in brackets into the correct tense to complete the conditional sentences.
• Check Ss' answers around the class.
Answer Key
1 has 5 would have raised
2 don't find 6 will be
3 would volunteer 7 won’t learn
4 wouldn't have realised 8 will become
Elicit what type of conditional each sentence is and whether it needs a comma or not.
Answer Key
1 type I, comma after 'water'
2 type 1, comma after 'species'
3 type 2, comma after 'you'
4 type 3, no comma
5 type 3, comma after 'media'
6 type 1, no comma
7 type I, no comma
8 type 1, comma after 'rhinos'
5. To practise conditionals with if /unless
• Ask Ss to read out the example. Explain that we can use unless instead of if... not in conditional sentences and that the verb is always in the affirmative after unless.
• Allow Ss time to complete the task.
Check Ss' answers
Answer key
1. if 2. unless 3. if 4. if
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