语法

Introductory it as Subject

1.2 it V to-inf

The verb is followed by a to-infinitive clause.
itVerb groupto-infinitive clause
SubjectVerbClause
Itmay helpto talk about it.
Ithurtto breathe.
Itpaysto shop around for the best deals.
Three of the verbs with this pattern indicate that something is helpful to someone, or is a good thing.
Different building societies offer different services so it pays to shop around.
The verb do usually occurs in negative clauses.
I'm learning the language. A career diplomat has to. It doesn't do to have to use translators all the time.
  • (not) do
  • help
  • pay
  • There are two other verbs with this pattern.
    Though his case was far from complete, he was convinced he was right. It remained to convince his superiors.
  • hurt
  • remain
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