Either the train is late or we are early.
Some conjunctions like the one above are used in pairs - either-or. Conjunctions which are used in pairs are Correlative Conjunctions.
Remember:- When we use correlative conjunctions, each of the corelated words should be just placed just before the words which are to be connected. eg In the above sentence, either is placed just before, 'the train' and or is placed just before 'we'.
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