spend on 后面是用动词ing形式吗A lot of money is spent on research into the causes of cancer.spend on 后面怎么没用动词ing形式?谢.

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spend on 后面是用动词ing形式吗A lot of money is spent on research into the causes of cancer.spend on 后面怎么没用动词ing形式?谢.
spend on 后面是用动词ing形式吗
A lot of money is spent on research into the causes of cancer.
spend on 后面怎么没用动词ing形式?
谢.

spend on 后面是用动词ing形式吗A lot of money is spent on research into the causes of cancer.spend on 后面怎么没用动词ing形式?谢.
人+spend money/time (in )doing sth 做某事花了多少钱或多少时间
人+spend money on sth 买sth花了多少钱
两种用法,明白了吧!

spend in 后面加ing

sb spends time on sth= it takes sb time to do sth.
sth costs sb money=sb spends money on sth=sb pays money for sth.
sb spends money on sth=sb pays money for sth.

research 在这里是名词,research into 探究,调查的意思
而这里应该是指对致癌原因的研究,into表示针对的对象