As a native English speaker, I find the phrase "The hammer need not to be large for..." sounds strange to my ears. Instead, I prefer "The hammer need not be large for...". But what is the rule that makes the former grammatically wrong? Or, maybe I am in error, and indeed the former is technically correct...
1 Answer
The verb "need" can function as a linking verb or an action verb. As a linking verb, you can say "need + do" just like you say "can + do" but when it functions as an action verb, an infinite will have to follow "need". That is when you say "need to do something".
The hammer need be large
in a literary or poetic context. I would prefermust
, though.