Question

Use should/must/ought to appropriately in the following sentences.
People who live in glass houses_________not throw stones.
1) You________wipe your feet before coming into the house, especially during the rains.
2) You________do what the teacher tells you.
3) The pupils were told that they________write more neatly.
4) Sign in front of a park; You_______not walk on the grass.
5) You________be ashamed of yourself for having made such a remark.
6) He left home at 9 o'clock. He________be here any minute.
7) "Whatever happened to the chocolate cake?" "How________I know? I have just arrived."

Answer 1

Hint: This question is about Modal Verbs. Modal verbs are a special type of verbs that we use to show the modality of the subject of the sentence. Modality refers to the different conditions, like a possibility, probability, capability, permission, request, order, suggestion, advice, obligation, etc. Modal verbs are always accompanied by the base form of another verb. There are many different modal verbs, each having its own proper usage.

Complete answer:
Words that show action (sing), occurrence (develop), or state of being are called verbs (exist). A verb is required in almost every phrase. The infinitive is the most fundamental form of a verb. Infinitives are the forms call, love, break and go. The question focuses on only three modal verbs, which are: “Should”, “Must”, and “ought to”.
Their functions are as follows:
i) Should- It is used to express advice, suggestions, etc. in a less formal as well as informal way. It is also used to express the probability of an event, ask polite questions as well as opinions.
ii) Must- It is used to express obligation, give orders, or even advice sometimes in a more formal way.
Ought to- It is used to express an obligation or an expectation that someone should fulfil.

Keeping the usage of the given Modal verbs, the solutions can be found as follows:
1) People who live in glass houses should not throw stones.
2) You must wipe your feet before coming into the house, especially during the rains.
3) You must do what the teacher tells you.
4) The pupils were told that they should write more neatly.
5) Sign in front of a park; You must not walk on the grass.
6) You Ought to be ashamed of yourself for having made such a remark.
7) He left home at 9 o'clock. He should be here any minute.
8) "Whatever happened to the chocolate cake?" "How should I know? I have just arrived."

Note:Types of verbs:
- Verbs that express activity but do not take an object are known as intransitive verbs. Without an object, the subject and verb express a complete notion.
- Verbs that express an action that ends in or is received by an object are known as transitive verbs. A noun, pronoun, or noun clause or phrase can be the object of a transitive verb.