PRESENT PERFECTVersión en línea What do you know about the Present Perfect? por Genoveva Márquez 1 PRESENT PERFECT 2 PRESENT PERFECT 3 FOR / SINCE For:We use "for", to talk about a period of time.E.g. "I have watched TV for 2 hours."Since:We use "since", to talk about a specific point in time, or a time when the action started.E.g. "I haven't traveled since 2010." 4 MAKE QUESTIONS USING PRES. PERF.