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The English preposition AT - 11 example sentences (2018) - World English Blog
Common uses with the preposition AT In English, we use the adjectives good, bad, better, worse, with the preposition AT, plus a subject. (Math, Science, History, English etc.) “I’m not good at history but I’m good at math.” “Allen is better than me at history but worse at math.” “We are both bad at science, but we are studying …