has thought是现在完成时=think about
如果有人已经考虑为我准备一份礼物,那会使我很开心的.
有时候when , until , if , unless引导状语从句时可用完成时代替现在时
如.I'll wait until you have finished your work
If you have found the answer ,please put up your hand那么名词也讲得通啊thought作名词讲时，通常用thoughts意思是“思想”，不用作单数