The danger of acts exists before the damage . causality of joint dangerous act is putative . the joint dangerous actors take joint and several liability to the outside while have recourse to do inside 构成共同危险行为不以行为的“共同性”为必要，行为人致人损害的危险在造成实际损害时必须已经存在，共同危险行为的因果关系是一种拟制的因果关系。
At the same time , we analyzed common injury act and common dangerous act and injuring others in partnership and relied on marketing theory to divide their compensation relationship of joint act of infringers 共同侵权行为人之间的内部求偿上，分别对共同加害行为、共同危险行为、合伙致人损害行为三种情况进行了分析，建议引入市场份额理论来确定内部求偿关系。
We studied the type of joint act of tort , included common injury act , common dangerous act and injuring others in partnership . its intension is that several people have joint fault for damage or joint fault inferred by law , including common intention and common mistake 研究了共同侵权行为的类型，包括共同加害行为、共同危险行为、合伙致人损害等行为:内涵即数个行为人对损害结果具有共同过错或法律推定的共同过错，既包括共同故意，又包括共同过失。
As to this , the author classified it to two categories , they are the cause of breaking promise and the cause of legal provision . the former specifically covers joint obligation , impartible obligation , concurrent obligation and joint responsibility guarantee etc ; the latter mainly refers to together tortious act and together jeopardizing act . here , the author also discusses in view of the practice to clarify the issue of the application of law 即连带责任的违反约定的成因和违反法定的成因，而前者具体包括连带债务，不可分债务，并存的债务承担，连带责任保证等，而后者则主要是指共同侵权行为和共同危险行为，当然对此笔者也进行了实践上的探讨，以明确法律的运用问题。
The form of non - essential joint and several liability can be classified and arranged by the regulation of permutation and combinations in maths . as a special responsible form , it has common with some people tort without joined intent , joint dangerous behavior , third person encroaching on creditor ' s rights , and so on 不真正连带债务的形态可以用数学中的排列组合规律做出系统分类和整理;作为一种特殊的责任形态,其与无意思联络的数人侵权、共同危险行为、第三人侵害债权等既有共性,但又存在着显著的区别。
