he thinks smoking can help him relax 为什么smoke 要加ing

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he thinks smoking can help him relax 为什么smoke 要加ing
he thinks smoking can help him relax 为什么smoke 要加ing

he thinks smoking can help him relax 为什么smoke 要加ing
he(主语) thinks(谓语) smoking can help him relax.(宾语从句)
smoking 在宾语从句中作主语,smoke是动词,作为主语时需要变成动名词.