Un ensayo sobre innovaciones educativas

Significa 'haber' (de existir). There + be se utiliza para hablar acerca de la existencia de algo, por lo tanto, ubicamos el sujeto real después del verbo.
There is - hay (singular)
There are -hay (plural)
There was - hubo, había (singular)
There were - hubo, había (plural)

There has been - ha habido (singular)
There have been - ha habido (plural)
There had been - había habidoThere will be - habrá
There will have been - habrá habido
There would be - habría
There would have been - habría habido

There can be - Puede haber
There could be - podría / pudo haber
There maybe - Puede haber
There might be - podría haber

There should be - debería haber
There must be - debe haber

There could have been - podría/pudo haber habido
There might have been - podríahaber habido
There should have been - debería haber habido
There must have been - debe haber habido

There has to be - tiene que haber (singular)
There have to be - tiene que haber (plural)There had to be - tuvo/tenía que haber (plural)

There has to have been - tiene que haber habido (singular)
There have to have been - tiene que haber habido (plural)
There had to have been -tuvo/tenía que haber habido

There is going to be - va a haber (singular)
There are going to be - va a haber (plural)
There was going to be - Iba a haber (singular)
There were going to be - Iba ahaber (plural)

There is (singular) - hay
There are (plural) - hay
There was (singular) - hubo, había
There were (plural) - hubo, había

In this lesson we will talk about there + the verb to be inthe present simple. (Vamos a hablar del verbo haber en el presente indicativo)
Structure and Use (there is/are)
There are and there is are forms used to express “existence of”. The structure is:There + verb to be (is for SINGULAR nouns ; are for PLURAL nouns)
Examples:
- There is a guitar in my room. (A guitar “exists” in my room)
- There are two chairs in my room. (Two chairs “exist” in...