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

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
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?
 

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