+ infinitive: The most common form, used to explain the reason for an action.: "He is studying to pass the exam"., + noun or gerund (-ing verb): Used to describe the purpose of an object or action.: "This machine is used for cleaning cars", "She is taking Spanish classes for her job.", + infinitive. These are more formal versions: "She woke up early in order to be on time", "They visited him so as to offer their condolences"., Used to show a negative purpose.: "He speaks slowly so as not to confuse the audience"., "She left early in order not to be late for the meeting.", Can be used to express a purpose of preparation.: "I will bring an umbrella in case it rains"., Used when the purpose is expressed in a full clause with a subject and verb.: "He spoke slowly so that everyone could understand him"., "They will leave the country so that they can have a better life".,

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