'Can', 'could', 'be able to', 'manage to' Present tenses Present perfect continuous 'Like' for preference and description Adverbs of frequency 'Have to' and 'must' The past simple tense Catherine ...

present perfect continuous: has ('s) / have ('ve) + been + ing present perfect simple: has ('s) / have ('ve) + past participle If the contracted forms present the greatest difficulty, it will be ...

You can send us your questions to [email protected] 1. We can use both present perfect and past simple for things that happened in the past. But if there's a result in the present ...