That's not very complicated: 
#!/usr/bin/perl

$_ = "This is first sentence.";
print "1st: match\n" if (/^This/ and /\.$/ and !/first/);

$_ = "This is second sentence.";
print "2nd: match\n" if (/^This/ and /\.$/ and !/first/);

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In reply to Re: Reguar expression by chomzee
in thread Reguar expression by selva

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