Adverbs también and tampoco
también - also
tampoco - don't (...) either
Mi amigo Pedro tiene un perro. Yo también tengo un perro. (My friend Pedro has a dog. I also have a dog.)
Mi amigo Pedro no tiene un perro. Yo tampoco tengo un perro. (My friend Pedro doesn't have a dog. I don't have a dog either.)
Progress, Vol. 2
Progress, all volumes
Spaced repetition
Cramming works for tomorrow's test but not for long-term retention. Spreading your study sessions out over days and weeks is far more effective than covering everything in one sitting.