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infinitive of purpose. Use the infinitive of purpose to talk about why someone does something. I went out to post a letter. She telephoned me to invite me out to dinner. We shouted to warn everyone of the danger. It is also used to say what can/must be done with something:
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infinitive of purpose • Use the infinitive of purpose to talk about why someone does something. I went out to post a letter. She telephoned me to invite me out to dinner. We shouted to warn everyone of the danger. • It is also used to say what can/must be done with something: It’s difficult to find a place to park in the city. Have you got a lot of work to do this evening. Would you like something to eat?
using so that • Sometimes we use so that to talk about the purpose of doing something. We use so that: • when the purpose is negative: I hurried so that I wouldn’t miss the train. Leave early so that you won’t find any traffic. • with can / could: He’s learning English so that he can study in Australia. We travelled to London so that we could visit our friends. • when one person does something so that another person does something else: I gave him my address so that he could contact me. He wore glasses and a false beard so that no one would recognize him.
Answer the questions using the infinitive of purpose. • Why do you have to go to the bank? • Why did she knock on your door? • Why are you saving money? • Why is Ron going to hospital? • Complete these sentences with a verb. • We are having a party ___ Ann’s birthday. • I didn’t have enough time ___ the newpaper today. • I wish I had enough money ___ a new car. • It’s a pity we haven’t got any nice pictures ___ on the wall. • I think I need some new clothes ___.
Write sentences with so that. • We wore warm clothes. We didn’t want to get cold. • I spoke very slowly. I wanted the man to understand what I said. • Please arrive early. We want to start the meeting on time. • I slowed down. I wanted the car behind to be able to overtake.