*Present-Past
Present perfect+since+Past simple
Ex: I have loved her since the first time I met her.
*Past-Past
-Past continous/Past simple+when+Past simple/Past continous
Ex: She came to my house when I was having dinner.
-Past perfect+when/before/by the time+past simple
Ex: Everyone had left before I came.
-Past simple+when+past simple
Ex: I changed clothes when I came home
-Past simple+after+Past perfect
Ex: I went to bed after I had done my homework
*Present-Future
Simple future+after+Simple present/present perfect
Ex: I will visit you after I have done my work.
trannhat900 
phamngoctienpy1987844 
vxh2k9850 
Nqoc_baka 