However, the learner must beware. A PDF of Murphy’s English Grammar in Use sitting on a desktop, never opened, is useless. A PDF that is annotated, cross-referenced, and used alongside active speaking and writing—that is a weapon of fluency.
: Using must have , might have , or can't have + past participle to guess about the past. libro gramatica ingles b2 pdf
: Deep dive into Past Continuous, Past Perfect Simple, and Past Perfect Continuous for storytelling. However, the learner must beware