certain - типичные ошибки в английском со словом certain
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1. She was extremely certain that they would offer her the job.

2. The present government is certain of losing the next election .

1. She was absolutely/quite certain that they would offer her the Job.

2. The present government Is certain to lose the next election.

1. Although usage varies, an adjective which contains the sense 'very', 'extremely', or '100%' as part of its meaning is NOT usually used with very or extremely. Examples are: boiling (= very hot), certain (= very sure), convinced (= very sure), delighted (= very pleased), desperate (= very worried), fascinated (= very interested (by)), fine (= very well, as in 'I feel fine'), freezing (= very cold), and starving (= very hungry). To intensify such adjectives, use absolutely, NOT very OR extremely.

2. certain of doing something = feel sure that you will do something: 'John is certain of being i nvited.' (= John's opinion)
certain to do something = win definitely do something: 'John is certain to be invited.' (= the speaker's opinion)