Unit2 sporting events - Grammar and Usage教案

step 3: comparison of some pairs of model verbs

comparison

can, be able to

shall, will

 need, dare

mustn’t, needn’t

1. read part 1 on page 30 and find the differences between can and be able to.

·be able to is more formal and less common than can when referring to ability.

·be able to can be used in different tenses or after other modal verbs, for example, will /shall be able to , would/should be able to , have/has /had been able to, must/may/might be able to.

·be able to can be used after the infinitive marker to.

·the past form of be able to is was/were able to.

·can is more common and informal than be able to when referring to ability

·can can be used to talk about a possible future action.

·the past form of can is could.

now please make some sentences with be able to and can, using different tenses, or after modal verbs or in a to-infinitive.

2. read part 2 and then complete the chart below.

shall

will

in affirmatives

expressing promises

expressing determinations or decisions

in questions

making offers or suggestions for third person

asking about willingness for the second and third person

make some sentences using shall or will.

let’s complete the dialogue ( part b on page 31), and then read the dialogue in pairs to check your answers.

b (1) shall   (2) shall      (3) will      (4) will/shall     (5) will    (6) will/shall  (7) shall/will3. read part 3 which explains the use of mustn’t and needn’t and then make sentences 4. read part 4 which explains when to use need or dare as modal verbs5. read the instructions for part a on page 31, and then complete the passage.

a (1) can            (2) dare       (3) can/could       (4) may/might/could

(5) mustn’t/shouldn’t/can’t  (6) mustn’t/shouldn’t/can’t    (7) can   (8)needn’t

step 4: consolidationi. relative items in recent years’ college entrance examination1. i was really anxious about you. you     home without a word. (nmet)a. mustn’t leave          b. shouldn’t have left   c. couldn’t have left   d. needn’t leave2. --is john coming by train?--he should but he    not. he likes driving his car. (nmet)a. must                          b. can         c. need         d. may