Necesito llamar a un taxi.
Why there is "a" here? why not llamar un taxi?
4 Answers
If you are trying to say I need to call a taxi, you don't need the 'a'. But if you say 'I need to call for a taxi' then you would leave the 'a' in. That's just how I see it, I'm not sure though.
I agree the "a" is not needed.
I agree with jgress13 on this.
If you want to call a taxi a "green and white car" (give it a name), the a is not necessary, ie: Voy a llamar el taxi "coche verde y blanco" pues me suena bien el nombre.
If you want to phone for a taxi, the a is necessary, ie: Voy a llamar a un taxi.
you need it for that sentence becaue your calling one to come and pick you up otherwise you don't need it