Woman in red cardigan: People do get their tenses of a verb confused. Making sure that the verb is in the same tense all the way through a document or a letter or an email. If you read it to yourself ...

'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 ...