Most students can form basic past tense. But can you confidently use inverted conditionals ( Had I known... ) or elliptical clauses? Grammar Builder 5 hones in on the tricky spots that even native speakers miss.

The "Grammar Builder" series is known for its practical, three-step approach: . This method ensures you don't just memorize rules but learn how to avoid common mistakes made by other learners. Grammar Builder Level 5, Volume 5 - Google Books