adverb
1
BAD : These computers can be used easily.
GOOD : These computers are easy to use.
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subject + be easy to use/make/read etc: 'Her English is very easy to understand.' 'The old manager was much easier to get along with.'
2
BAD : In London you easily get from one place to another.
GOOD : In London it's easy to get from one place to another.
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It's easy (for sb) to do sth : 'It's easy to get lost in London.' 'It's easy to see why everyone likes him.'
3
BAD : The next morning I didn't get up easily.
GOOD : The next morning I found it difficult to get up.
GOOD : The next morning I had difficulty (in) getting up.
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Instead of using a negative verb with easily, use an affirmative verb with difficult/difficulty : 'I find Carl's handwriting very difficult to read.' 'Sometimes it's difficult to know what to do.'