Could a shortage of shut-eye also (

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Could a shortage of shut-eye also (be helping to) make us fat?(be helping to)是什么用法?
Could a shortage of shut-eye also (be helping to) make us fat?
请问这里(be helping to)是现在进行时吗? 
这句话的句子结构,如主语,谓语,宾语是什么?
 

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  • 主语是a shortage of shut-eye,谓语是 could...be helping 宾语是 to make
    是进行时.