We use certain clauses to show why somebody does something. These are called clauses of purpose. They are introduced with the following words or expressions: to + infinitive ; David went out to buy a bottle of wine. in order to / so as to We were asked to say over in order to finish the project. in order not to/so as not to + infinitive – we walked in quietly so as not to wake up the children. prevent + noun/pronoun + from + ing – I parked the car under a tree to prevent it from getting too hot.
We use a reason clause when we want to explain why someone does something or why it happens. When we are simply giving the reason for something, we use “because”, ‘since’ or ‘as’ Mark joined the English Drama Club because he wanted to improve his intonation As/Since she wanted to practice her spoken English, Carrie made acquaintance with several native speakers
When we are talking about possible situation which explains the reason why someone does something, we use ‘in case’ or ‘just in case’ I’ve got the keys in case we want to go inside. I’m here just in case something unusual happens.
Clauses of Result Придаточные предложения следствия. We use ‘so’ or ‘so that’ to say what the result of an action or situation is. Or also ‘such …that’ is used. Nathan was having problems with mathematics, so he went to see his tutor to ask for advice. There were so many books on the subject that Judy didn’t know where to begin Those were such wonderful days that I will never forget them That was such wonderful time that I will never forget it
