i've never seen such a bad film as that one -> that's the worst film they have not liked ice-cream since they ate too much and was sick

`->` That's the worst film I have ever seen 

`->` This / That is the + adj est / most + adj + S + have /  has + ever + Vpp+ O 

`->` They didn’t like ice-cream when they ate too much and was sick.

`->` Chuyển từ thì HTHT `->` QKD 

Chuyển:  haven't liked `->` didn't like 

Since `->` when