是now that 吧,now that 是“既然,因为”的意思.是连词,例句：Now that you are a big boy,don't do such a thing.既然你已经是个大男孩了,就不要做这种事.so that 也是连接词,词义是“因此；以致”.例句：The bus broken down,so that we had to walk.公共汽车抛锚了,因此我们必须步行.so----that是 “非常------所以” 的意思.例句：We were so tired that we could not walk any further.我们太累了,所以无法再往前行. 不知这个答案是否令你满意,
