lo

1. him, it

masculine direct object or fact

• Lo vi ayer.I saw him yesterday.
• Lo necesito ahora.I need it now.
• Voy a comprarlo mañana.I am going to buy it tomorrow.

2. the good thing, what is ..., the ... lo + adjetivo o adverbio

an adjective or adverb used as an abstract notion

• Lo bueno es que estamos juntos.The good thing is that we are together.
• Lo mejor del viaje fue el mar.The best thing about the trip was the sea.
• No entiendo lo escrito.I do not understand what was written.

3. what, that which; the matter of lo que; lo de + sustantivo

a thing, fact, or matter being referred to

• Lo que dices es verdad.What you say is true.
• No sé lo de ayer.I do not know about yesterday's matter.
• Eso es lo que quiero.That is what I want.

4. how ...; the degree to which lo + adjetivo + que

degree or intensity of a quality

• No sabes lo cansado que estoy.You do not know how tired I am.
• Mira lo grande que es esta casa.Look how big this house is.
• Es increíble lo rápido que corre.It is incredible how fast he runs.