perfect tenses with this is the first time…, etc

  • We use a present perfect tense after the following expressions:
      This/that/it is the first/second/third/fourth/etc
      This/that/it is the only . . .
      This/that/it is the best/worst/finest/most interesting/etc


      This is the first time (that) I’ve heard her sing.
      That’s the third time you’ve asked me that question.
      It’s one of the most interesting books I’ve ever read.
  • When we talk about the past, we use a past perfect tense after the same expressions.
      It was the third time he had been in love that year.
      (NOT . . . ihe third time he was . . .)