Contextual Grammar
Exams now test 'Sentence Correction' within a context. Focus on Subject-Verb Agreement, Parallelism, and Modifier errors. These cover 70% of exam questions.
The 'Ear' Test
Read a sentence aloud. If it sounds 'clunky', it's likely wrong. This intuitive sense is built by reading high-quality prose daily.
Practice: Identify grammar errors in your daily newspaper reading sessions.