Question

ejemplos de was there y were there

Answer 1

pasado de 'hay' existencia había, habían, hubo, hubieron 
there was seguido de sustantivo singular o uno no contable 

there was a book on the table 
había un libro en la mesa 
there was some coffee in the cup 
había café en la taza 

there were seguido de sustantivo plural 
there were some people at the door 
había unas personas en la puerta 

there + una forma del verbo be + un sustantivo = haber para indicar existencia 

there is = hay singular y no contable 
there are = hay plural 
there was = hubo/había singular y no contable 
there were = hubieron/habían 
there has been = ha habido singular y no contable 
there have been =han habido 
there is going to be = va a haber singular y no contable 
there are going to be = van a haber 
there was going to be = iba a haber singular y no contable 
there were going to be = iban a haber 
there will be = habrá 
there would be = habría 
there can be = puede haber 
there could be = podría haber 
there should be = debería haber 
there ought to be = debería haber 
there must be = debe haber 
there has to be = tiene que haber singular y no contable 
there have to be = tienen que haber 

Answer 2

there was a girl I loved
there was a book I wanted to buy
there was a nice car that I saw yesterday
(there was lo usamos para palabras en singular)

there were many girls I fell in love with
there were books on the shelf
there were cars on the way
(there were lo usamos para palabras en plural)