Callan Stage 6 page 558 -560 Grammar Questions

レッスンで出てきた文法・単語	SENTENCE STRUCTURE: -I thought I should go to London tomorrow.  -No, the word whoever is not used correctly in that sentence. GRAMMAR: -When we change direct speech into indirect speech we put the tenses into the past.  -Verbs that are already in the past remain unchanged, or are put further into the past. -The Past of shall is should, whilst the Past of will is would.  -The Future in the Past is the use of should and would for shall and will, and we use it for something said in the past which refers to a future action. -The difference between the words what and whatever is that the word what we use in a limited sense, whilst the word whatever we use in an unlimited sense.  -Because it is the object of the sentence, and should therefore be whomever. -The complete imperative of the verb to take is - let me take; take; let him take; let her take; let it take; let us take; take; let them take.  -We form the negative of the imperative by using do not. -We form the Past, Present and Future Perfect Progressive Tenses by using the verb to have with the word been and the Present Participle of the main verb.  -Another name for these tenses is the Duration Form. -The difference between the ordinary progressive and the perfect progressive is that we use the ordinary Progressive Tense when we only wish to express a continuous action, whilst we use the Perfect Progressive Tense when we wish to add how long the action has been in progress.
レッスンで利用した教材	Callan Stage 6 book
レッスンで利用した教材のページ数	558-560