按等级分的语法
把正确的句子和有说服力的句子分开的那些结构。每页用平实的话解释规律，随后给练习。
B2
Verbs that change meaning: stop, remember, try, meanWhich verbs change meaning with -ing and to?Must have, might have, should have, needn’t haveHow do you use must have, might have and needn’t have?Wish, if only, it’s time, would ratherWhy does English use past tenses to talk about the present?Articles: a, an, the, and none at allWhen do you use a, an, the, or no article at all?Reported speechHow do tenses change in reported speech?Narrative tensesHow do you use the past perfect and past continuous in a story?Although, despite, whereas, neverthelessWhat is the difference between although, despite, whereas and nevertheless?Dependent prepositionsWhich preposition goes with depend, result, accuse, blame and insist?
C1
Mixed conditionalsHow do mixed conditionals work in English?Inversion after negative adverbialsWhen do you invert the subject and verb in English?Cleft sentences: it was… that, what… isHow do you use cleft sentences to emphasise something?Participle clausesHow do participle clauses work in English?It is said that… / He is said to…How do you use passive reporting structures in formal English?