ta có cấu trúc thì HTHT + since
-> s + have / has + since + 1 mốc thời gian
last sunday là mốc thời gian
Tom went to England last Sunday and is still here
-> Tom has gone to England since last sunday and still here
-> has gone là đã đi nhưng chưa trở về
-> sau since + thì QKĐ