have词性
have考研作为动词，也可以作为助词
vt.有;持有;占有;由…组成;显示出，带有(性质、特征)
aux.与过去分词连用构成完成时
第三人称单数 has；现在分词 having；过去式 had；过去分词 had
用法例句
The first part of the plan has been safely accomplished.
计划的第一部分已顺利完成。
We had no say in the decision to sell the company.
在决定出售公司的问题上，我们没有发言权。
Number Ten had nothing to say on the matter.
唐宁街十号对此不作评论。
Lack of money will have an adverse effect on our research programme.
缺少资金将对我们的研究方案有不利影响。
Almost all homes have at least one TV set.
差不多每家都至少有一台电视机。