Correct Answer:
D. since
The error in the sentence 'He is suffering from fever since Monday' is D: since. This sentence incorrectly uses the present continuous tense ('is suffering') with a time expression ('since Monday') that indicates an action or state that began in the past and continues up to the present.
When an action or state started at a specific point in the past and is still ongoing, we must use a perfect tense, specifically the present perfect continuous tense or the present perfect tense. The phrase 'since Monday' clearly indicates a duration that began on Monday and extends to the present moment.
- The correct sentence should be: 'He has been suffering from fever since Monday.' (Present perfect continuous)
- Alternatively, if the focus were on the completed duration, 'He has suffered from fever since Monday' could also be used, though 'has been suffering' is more common for ongoing conditions.
Let's look at the other options:
- A: is suffering is the present continuous tense, which is incorrect when combined with 'since Monday'.
- B: from is the correct preposition to use with 'suffering' (one suffers from an illness).
- C: fever is the correct noun for the illness.
Therefore, 'since' highlights the need for a different verb tense to accurately reflect the duration of the suffering.