Past form 'ought' (spelling)

The following verbs have irregular past forms with 'ought'

bring - brought
buy - bought
fight - fought
seek - sought
think - thought

The past tense of 'catch' and 'teach' is spelt differently but has the same sound.
catch - caught
teach - taught

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Prefix 'in'

You may change the meaning of some words by adding the prefix ‘in’ (meaning “not”).

inaccurate, inadequate, inadvisable, inappropriate, inauthentic, incapable, incompatible, inconclusive, inconstant, incorrect, incurable, inconvenient, incomplete, inexperienced, independent, indecent, indecisive, indescribable, indestructible, indirect, inefficient, inequality, inessential, inexact, inexcusable, inexpensive, inflexible, infrequent, inhumane, insane, inseparable, insensitive, insignificant

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