现在完成时+since+具体时间造句

问题描述:

现在完成时+since+具体时间造句
用“现在完成时+since+具体时间/一般过去式”和“现在完成时+for+一段时间”分别造句

I have learned English since 2006.共三句He has felt better since he stopped smokingI have taught English for 3 years不懂请追问