cause

　　She’s always causing trouble. 此句中cause用作及物动词,意为“使发生,引起”,这是cause的常用法。cause还有其它用法。如:

　　①Smoking is one of the causes of heart disease. (cause用作可数名词,意为“原因,理由”。)

　　②People fought for the cause of freedom and peace. (cause用作名词,意为“事业,目标”。)