not conjugating the tense of a verb when using el qual, lo qual

Question

In the example "Estas mesas, las cuales he comprado recientemente, son de madera.These tables, which I bought recently, are made of wood."  the "I bought" is not conjugated.  Comprado is in the present tense, is this correct or should it be comprade - I bought in past tense

Inma Sánchez · Accepted Answer

Hola Glenys
This "he comprado" is conjugated in El Pretérito Perfecto" (have bought) - If we'd used the simple past it'd be "compré". Here is a bit of information about this tense in Spanish and some lessons at the bottom that we have in Kwiziq. 
Have a look here.
I hope it helps.
Saludos
Inma

Marsha Cornelius · Answer

"I bought" has been conjugated in the present perfect tense - he comprado which means I [he] have bought [comprado] Link to lesson on this tense - https://tinyurl.com/2ndy87eu