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Hi, Everyone.

I am a student studying in Hongkong and taking a course - Analysing English Grammar. Now, I am doing an assignment which is very difficult to me. See, anyone can help me.

There are mistakes in the following sentences, please point out and give explanation, then correct it.

1. If you check your work carefully, I'm sure you will make less mistakes.
2. Hopefully the economy will strengthen in the next few years.
3. Although he did not accuse me directly he inferred that the responsibility was mine.
4. The data confirms what we have always suspected.
5. They were completely bored and disinterested in the subject.
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Comments  (Page 2) 
HKese1. If you check your work carefully, I'm sure you will make less mistakes.

It should be fewer in place of less because is using less for a countable noun (mistakes) is incorrect.

2. Hopefully the economy will strengthen in the next few years.

Hopefully the economy will be strengthened in the next five years.

We need passive voice because the economy is not the active subject.

3. Although he did not accuse me directly he inferred that the responsibility was mine.
4. The data confirms what we have always suspected.

The data confirm what we have always suspected.

Data is plural and thus it requires a plural verb.

5. They were completely bored and disinterested in the subject.

They are completely bored and uninterested in the subject.

Disinterested means to be without selfish interest.