while i <= length(line) do
  begin
    chr := line[i];
    inc(i);

    comment:=(chr='{') or (chr<>'}') and comment; {Исключение комментариев из анализа, вложенность не учитывается}

    if (chr = ' ') or (chr = #13) or (chr = #10) or comment then
      continue;

    if (not (chr in SymbOfFirstGr)) and (not (chr in SymbOfSecondGr)) and (not (chr in commentSymb)) then
      begin
        Dialogs.MessageDlg('Ошибка '+IntToStr(i-1)+'  символ не верен ',mtError,[mbOk],0);
        exit;
      end;

    if chr in SymbOfFirstGr then
    begin
      start := i-1;
      while (chr <> ' ') and (chr <> #13) and (chr <> #10) and (chr<>'{') and ( i <= length(line)+1) do
      begin
        chr := line [i];
        inc(i);
      end;
      curword := copy(line, start, i-start-1);
      CheckFirstGrammar(curword);
      dec(i);
      continue;
    end;

    if chr in SymbOfSecondGr then
    begin
      start := i-1;
      while (chr <> ' ') and (chr <> #13) and (chr <> #10) and (chr<>'{') and ( i <= length(line)+1) do
      begin
        chr := line [i];
        inc(i);
      end;
      curword := copy(line, start, i-start-1);
      CheckSecondGrammar(curword);
      dec(i);
      continue;
    end;

  end;