1.I can't agree on your plan. 我不同意你的计划. 2.现在完成时的语言标志 have done sth.这是核心.时间标志是for sometime.其他标志yet,already. 例如: I haven't finished my homework yet. I have finished my homework already. I have been here for many years. 过去进行时的语言标志 were/was doing sth.这是核心,指当时正在干什么.时间标志then,at that time等等. 一般过去时的语言标志 动词都是过去式了,时间状语也都是表示过去的,例如yesterday,in the past,three years ago等等. 希望你能自己再扩展扩展