• CUYO/A/S is the equivalent of 'whose' used as a relative in English (not for questions):
Es un autor cuyos libros conozco bien. BUT: ¿De quién es esta pluma? |
It's an author whose books I know well. Whose pen is this? |
• Both neuter forms LO CUAL and LO QUE are used in
clauses, set off by a comma,
referring back to a previously stated idea. In this usage they correspond to the English which:
Creen que soy brillante, lo cual es cierto. Hay nubes, lo que indica lluvia. |
They think I'm brilliant, which is true. There are some clouds, which indicates rain. |
• LO QUE means what in noun clauses:
Esto es lo que contesta. Lo que pensamos no es importante. |
This is what he answers. What we think is not important. |
• TODO LO QUE means all that or everything that:
Todo lo que escribe es bueno. |
Everything (that) she writes is good. |