In exclamatory form, 'It is strange...' is transformed into phrases like 'To think of...'.

A Complex Sentence depends on a main clause and at least one subordinate clause. In the above sentence, 'He liked' is a main clause and the answer to what? (suggestion) is the subordinate clause. The conjunction 'what' has been used to join them.

To make an Assertive sentence, 'He was' must be used in place of 'was he not'.

According to the given options, option (3) is considered the correct answer. Grammatically, when changing from Assertive to Interrogative, the meaning should be preserved, but according to the exam key, option (3) is correct.

In option (3), the Assertive of 'Were we sent into the world simply to make money?' should be 'We were not sent into the world simply to make money.'

The sentence 'She is sometimes clever' means she is not always foolish/stupid. Therefore, 'She is not always stupid' conveys the same meaning.

The Negative word 'Never' is replaced by its antonym 'Ever' while converting the Assertive form to the Interrogative form.

Affirmative 'Everybody was present' changes to negative using antonym 'absent' and 'Nobody': 'Nobody was absent'.

In some affirmative transformations, instead of applying a particular rule, the transformation is done by understanding the sense of the sentence and using an appropriate word or phrase. Here, 'Didn't help to much extent' is used instead of 'Consider something to some extent'.

To transform from affirmative to negative without changing the meaning, a double negative ('not without') is used.

If an Assertive Sentence starts with 'everyone' and no negative word is used, then the Interrogative Sentence is started with 'Who' and is transformed into an Interrogative Sentence by using a suitable negative word.

To form a compound sentence, the 'yet' conjunction is used to show contrast.

A Complex Sentence relies on a main and a subordinate clause. In the above sentence, 'He proved' is a main clause and 'he was innocent' is a subordinate clause. To join these two sentences, we use the subordinating conjunction 'that'.

An assertive wish starting with 'I wish' converts to exclamatory starting with 'O that...' or 'If only...'.

In a compound sentence, two independent clauses are joined by the 'and' conjunction.

'Alas!' denotes sorrow, which is transformed into 'It is extremely sad that...'.

To change the Assertive form (Subject+Verb+Object+...) into an Interrogative Sentence, we use the structure: Verb + Subject + Object + (?).

The assertive sentence 'He is a great doctor' converts to exclamatory 'What a great doctor he is!'.