一个英语句子的成分ing形式和to do形式到底应该怎么用呢?
两个句子,后面有的接ing,有的接to do,能拜托解释下为什么用不同的形式?
1 Now researchers suspect that dreams are part of the mind's emotional thermostat,regulating moods while the brain is "off-line"
2 And one leading authority says that these intensely powerful mental events can be not only harnessed but actually brought under conscious control,to help us sleep and feel better