:?: They buy shirt to wear.
They use pen to write.
In this sentences, infinitive as adjective if yes, plz explain me how to identify infinitive as adjective and how to recognize infinitive as adverb.
***NOT A TEACHER***
Good morning, satya.
(1) I think that the infinitives in your two sentences are adverbial.
(a) They answer the question WHY?
(i) Why do they buy a shirt? (In order) to wear it.
(ii) Why do they use a pen? (In order) to write.
(2) If an infinitive is adjectival, it often answers the question WHAT?
(i) I have a job to do. What do I have? A job to do.
(ii) A policy to meet this emergency is needed. What is needed? A policy to meet this emergency.
(iii) I have nothing to say. What do you have? Nothing to say.
(3) I know that it is sometimes difficult to know whether a noun + infinitive is adverbial or adjectival.
(a) I need a car to drive to the mountains. Why do I need a car? (In order)to drive to the mountains./ Because I want to drive to the mountains. So I think we can call the infinitive clause adverbial.
(b) A car to drive to the mountains needs to be powerful. What needs to be powerful? A car to drive to the mountains. So I think that we can say that "to drive to the mountains" modifies "car." Thus it is adjectival.
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