Fill in the Blanks

Words ending with 's' take appostrophe at the end, without any additional 's'. Meeting is of the teachers (plural).

Case of past indefinite tense. 'Can' and 'can be' are used for present tense, and 'could' is used for past tense. 'Could be' is used for past continuous tense and for passive voice.

This is a case of probability of an action/event. In cases of probability, we use either 'may be' (in stronger cases) or 'might be' (in weaker cases).

Case of present perfect tense. 'Will have' and 'shall have' are used for future tense. 'Should have' is used for a piece of advice. In cases of certainity like this, we use 'must have'.

This is a case of advice (which needs to be accepted). Modal 'must' is the best usage here. 'Could' and 'had to' refer to past tense. 'Would have' takes the 'third form of the verb'.

'Should' is the correct option because when an opinion is given, it is very much stressed upon. 'may' and 'might' are incorrect because they are used when there is any type of uncertainity. 'should have' is unsuitable because in the sentence first form of the verb (do) is used.

When we ask for 'wish or desire' of someone, we use modal 'would'. For example: 'Would you like to have some snacks with tea?'

If the principal clause of a sentence is in past indefinite tense, the subsidiary clause takes modal 'would'.

This is an optative sentence, where a wish has been made. In such cases, we always use modal 'may'.

Case of past indefinite tense. We use modal 'used to' to refer to a habit of the past.

Usage of 'to' in the sentence qualifies none other modal than 'ought'.

Case of past indefinite tense. To mention about a habit of the past, we use modal 'used to'.

The sentence implies that nobody has the courage to go against his wish. Modal 'dares' best expresses the same.

Case of future tense. We generally use 'shall' for the first person.

Case of future indefinte tense. 'Shall' is generally used for the first person; modal 'need' takes 'to' with it; 'used to' is used for past tense. Modal 'will' is the right choice here as it is used for the second and the third person in the case of future tense.