Question

Let us make a hole in the wall pick out the infinitive

Answer 1

Hey mate!!

Let is the infinitive in the sentence:-

Let us make hole in the wall.


Thanks for the question !!

☺☺☺

Answer 2

Let means to give  the permission or to allow. Let along with the infinitive is mostly used to give suggestions.  

It is usually that a person wants to do.  

Let us is first person and plural imperative.  

In the given sentence ‘Let us make a hole in the wall pick’ the infinitive is let us.