Example sentences of "it [is] [adv] [verb] if [noun] " in BNC.

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1 It 's not known if Nixon or Reagan ever read this passage .
2 ‘ At this stage it is not known if charges will follow as this will depend upon the results these interviews and other inquiries . ’
3 Apart from the symphonies , Mozart 's compositions of 1788 include the Piano Concerto in C , K.503 , written in February ( it is not known if Mozart ever played it in public ) ; several new numbers for the Vienna première of Don Giovanni in May ( despite starring Caterina Cavalieri as Donna Elvira and Aloysia Lange as Donna Anna , the opera was even less successful there than Figaro , having only 15 further performances ) ; three piano trios written for Puchberg ; a piano sonata , and a quantity of light vocal music .
4 For example it is not known if landlords will be prevented from making unfair rent rises to cover what they claim is the cost of the Council Tax .
5 It is not known if Mrs Thatcher continues to practise this self-denying ordinance .
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