Following are the most common idioms using haber. For other usages of haber, see lessons on its use as an auxiliary verb and as a translation for "there is" or "there are." Also note that the conjugation of haber is highly irregular.

Keep in mind also that many expressions use hay. Although the meaning of many of them can be deduced from the words, they aren't necessarily translated literally. For example, hay sol (literally, "there is sun") is often used for "it is sunny," and ¡eres de lo que no hay! (literally, "you are of that which there are none") can be used for "you're unbelievable!" or something like that.