例句：
In 'Ben likes school', the verb 'like' is in the indicative.
在Ben likes school中，动词like是陈述语气。
Their failure to act is indicative of their lack of interest.
他们未采取行动，这表示他们没有兴趣。
His action is indicative of growing concern about the shortage of skilled labour.
他的行为显示对于熟练工人短缺现象的日益关注。