When you are trying to proofread your writing for clear, accurate, and correctly punctuated sentences, it is a big help to be able to spot verbs and their subjects. These quick hints will help you find the verbs and the subjects of your sentences.
I understand the above completely but want to know the use of "to be able to". I am really confused by "to be" here? I know the meaning of the sentence when I read but unable to use in my own writing. I know infinitive can be used adjectivially or adverbially.
Top answer
" is kind of a deferred subject whose place is initially taken by dummy/anticipatory "it".
— GPY
" is kind of a deferred subject whose place is initially taken by dummy/anticipatory "it".
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The meaning is "to be able to spot verbs and their subjects is a big help", so it seems that "to be able ..." is kind of a deferred subject whose place is initially taken by dummy/anticipatory "it".