Join the sentences using ‘but’ as a preposition:
He left the house this morning. He was wearing only a hat and shoes.
A) He left the house this morning but with a hat.
B) He left the house this morning wearing nothing but a hat and shoes.
C) But with shoes he left the house.
D) Everybody but he left the house with a hat.

Hint: Prepositions is a word or a group of words used before noun, pronoun or noun phrase and sometimes prepositions are used before gerunds. Prepositions words are: on, in, to, at, of, but, an and etc.

Complete answer:
‘But’ as a preposition followed by a noun. For example: There’s been nothing but trouble since she came. ‘But’ is used as an alternative to except. ‘But’ is used after words like: everyone, nobody, anything, anywhere, all, no, none, any, every.

Option A) He left the house this morning but with a hat – is an incorrect answer because the formation of the sentence using preposition ‘but’ is incorrect. It has changed the meaning of the sentence given in the question. Thus, this is wrongly used and therefore, this is an incorrect answer.
Option B) He left the house this morning wearing nothing but a hat and shoes – is the correct answer because this option gives the same meaning as of the sentence given in the question. But is used correctly and didn’t change the meaning of the sentence. Thus, this is the correct answer.
Option C) But with shoes he left the house – is an incorrect answer because the sentence cannot with ‘but’. But can be used as a conjunction or connector for joining two clauses. And this option does not define the actual meaning of the sentence. Thus, this is an incorrect answer.
Option D) Everybody but he left the house with a hat – is an incorrect answer because the preposition ‘but’ does not sync with the actual meaning of the sentence given in the question. Thus, this is an incorrect answer.

He left the house this morning wearing nothing but a hat and shoes. (Option B)

Thus the correct answer is option ‘B’

Note: But can be used as an adverb, conjunction and as preposition. But is used to connect ideas that contrast. There are golden rules of prepositions and they are:
- A preposition must have an object. All prepositions have objects.
- Positions of prepositions are before the noun or pronoun.
- When a pronoun follows a preposition then it should be in the object form.