Discourse markers are words and phrases that are used to manage and organize the structure of speech or writing. They connect sentences without changing the general meaning of what is being said.
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Conjunctions & Discourse markers
We use the conjunctions because, so, etc. when we want to explain what is happening and why it is happening.
We can use to + infinitive and for + noun to say what is the purpose of an action, or the reason why we do something.