谁能告诉我这几个词（组）的区别

前两者都是表示：在...情况或条件下；假若；倘若；除非
I will agree to go provided/providing that my expense are paid.
假如为我负担费用,我就同意去.
Provided we get good weather it will be a succeful holiday.
如果天气良好,我们的假日将过的非常好.
后者表示：假定；假设；假如：Supposeing that it rains,can we play the match indoors?要是下雨的话,我们在室内比赛行吗?