A Verb to be; simple past (affirmative, negative and interrogative forms); the use of the genitive case (‘s), and the use of the adjectives.
B Modal verbs(present and past) can and could; adverbs of time, and simple past of regular verbs.
C Modal verbs (affirmative, negative and interrogative forms); the use of the apostrophe (‘s), and the use of the possessive pronouns.
D Simple past pf irregular verbs; adverbs of manner, and possessive adjectives.
E Verb to be; simple present (affirmative, negative and interrogative forms); the use of the genitive case (‘s), and the use of the possessive adjectives.