Examines the difference between ‘I’m glad you can come’ and ‘I’m glad you could come’, showing how the choice depends on when the conversation takes place. Also addresses the could vs was/were able to rule.
An advanced grammar series covering the present perfect and aspect, modal verbs, reported speech and backshift, the passive voice, phrasal and prepositional verbs, gerunds and participles, determiners, and dependent and noun clauses.