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3. have trouble (in) doing sth. 做某事有麻煩 . Do you have trouble in learning English? 你在英語上有困難嗎 ? Step3 Summary 1. We use It is + adjective + toinfinitive to express what we think about something. 2. We can add for someone to specify who we are talking about. 3. We can use It is + adjective + of... + toinfinitive to express what we think of someone39。如: brave, careless, clever, foolish, generous, good, helpful, honest, kind, nice, polite, silly, stupid, wrong。s + adj. +