Agreed.
Too many error types can be confusing on SC. While there are
numerous concepts that can
potentially be tested in Sentence Correction, the saving grace is that a
single SC question is likely to test you on
only 2-3 of these concepts.
Hence, you need to develop an eye for doing a
vertical scan of the five options, to quickly figure out
which 2-3 concepts are being tested in the given question.
For example,
(1) if three options use
play while others use
plays, you know that
subject-verb agreement is being tested. Use your
subject-verb knowledge to eliminate incorrect options, and focus on remaining.
(2) Similarly, if three options use
played while others use
have played, you know that
tenses are being tested. Use your knowledge of
tenses to eliminate incorrect options and focus on remaining.
(3) Similarly, if three options use
it while others use
they/them, you know that
pronouns are being tested. Use your knowledge of
pronouns to eliminate incorrect options and focus on remaining.
---
and so on.
This strategy of successively
splitting the answer choices, is normally sufficient to bring you down to the final
two possibly correct options. Choosing between these last two, might require slightly
refined understanding of the finer nuances of SC.