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hasn’t understood hasn’t been understood didn’t understand wasn’t understood
could they couldn't they did they didn't they
amazing surprising puzzled satisfied
advised acquainted enlightened communicated
didn't understand not understand shouldn't understand understands
amazing surprising puzzled satisfied
why you didn’t watch the football match why didn’t you watch the football match why you don’t watch the football match why don't you watch the football match
That; why Which; how What; what What; why
understood weren't understanding didn't understand understand
That; why Which; how What; what What; why
They invented false theories to explain things they didn't understand. They falsely claimed to know all about nature. They did not believe in results from scientific observation. They paid little attention to the problems they didn't understand.
why you didn’t watch the football match why didn’t you watch the football match why you don’t watch the football match why don't you watch the football match
don't; since didn't; since don't; until didn't; until
That; why What; why That; that What; whether
puzzling; shouldn’t understand puzzled; didn’t understand puzzled; shouldn’t understand puzzling; didn’t understand
didn't understand didn't be understood wasn't understand wasn't understood
could they didn’t he do they could it
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