0 The past perfect (pluperfect) is correct in all three sentences. They refer to an action completed before another action expressed in the past. Good job.
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01cite10Newguest12cite10I'm wondering if 11font11del10this12del10 it 12font10would also be 11font11del10fine12del10 all right12font10 to use the past simple in the first one, i.e., ..the lesson began? Wo
01cite10CalifJim12cite11blockquote11cite20Newguest22cite20I'm wondering if 21font21del20this22del20 it 22font20would also be 21font21del20fine22del20 all right22font20 t
01cite10Marius Hancu12cite10Google Books: 12br
12br
11b1012712b10 on 11b10"be fine to use"12b12br
12br
11a15010 12a12br
12br
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