Too & Enough

Too means more than is good or possible. It goes before an adjective or adverb:

• This coffee is too hot to drink. You're driving too fast.

Enough means as much as you need. It goes after an adjective or adverb, but before a noun:

• He isn't old enough to drive. (not enough old)
• There aren't enough chairs. We don't have enough time.

Both are often followed by to + verb or for + a person or thing: too heavy for me to carry, big enough for four people. Too usually has a negative meaning: too expensive means you can't or don't want to buy it.