what do you mean? link is timing the button while the opponent is still in stun animation when the previous hit connect, depending on which character you play the links are different, for example old man Ryu, do standing medium punch then link a couching heavy punch, unlike in MK, you cant really just press buttons in a set sequence and whether the first hit of the sequences connects, the rest will also connect, in SF you have to time each button depending on the previous one and so, you also have to recognize which normal allows you to link to which normal (Ryu again, you can also link standing medium punch into crouching medium punch or crouching medium kick.. so on and so forth) you just need to test with your character.. on the other hand, sfv has a lot of target combos (same concept of MK) which some allows to be special canceled while others do not, like Ryu's standing Medium punch-heavy punch-heavy kick which cannot be special canceled, while R.Mika's standing light kick-standing medium punch can.