private boolean  isStatement()
    {
           if(currentToken.getType()==token.KW_ID ||currentToken.getType()==token.KW_PRINT ||
           currentToken.getType()==token.KW_READ || currentToken.getType()==token.KW_IF ||
           currentToken.getType()==token.KW_WHILE || currentToken.getType()==token.KW_FOR ||
           currentToken.getType()==token.KW_RETURN|| currentToken.getType()==token.KW_BREAK) {
           return true;
           }
           return false;

    }