Sorry , I am too busy now. If I -----time , I would certainl

Sorry ,I am too busy now.If I had time ,I would certainly go for an outing with you.
不好意思,我现在很忙.如果我（现在）有时间的话,我肯定和你去郊游.
很明显,题目中的虚拟是对现在事实的假设,所以条件从句用一般过去时,主句would+v.
如果是对过去事实的假设虚拟,那条件从句就用过去完成时 had+过去分词
如：If you had come here yesterday,you would have met Mr.Wang.
昨天你要是来这里的话,你就会见到王先生了.（对过去,昨天的假设）