I am working on the challenge of "if . . . then" statements, and after some work feel I am getting it. But when trying to put in objects with them I feel unsure. I am hoping someone can check these:

Le presté a mi hermana dinero. Si no hubiera sabido sus problemas, no se lo habría dado.

Tú no sabías la repuesta. Si me hubieras preguntado, la habrías saber.

Julian se sentía bien. Si se hubiera sentido mal, no habría ido a la fiesta.

#2 = saber = sabido

After a form of haber be sure to have a past participle, usually ending in -do,-to, -cho

Sra

¡Ah, sí! ¡Gracias--muy amable!

Great job on working with "if . . . then" statements! It's an important concept in conditional sentences. Now, let's review your sentences:

1. Le presté a mi hermana dinero. Si no hubiera sabido sus problemas, no se lo habría dado.
Translation: I lent money to my sister. If I hadn't known about her problems, I wouldn't have given it to her.

Your sentence is correct. It follows the pattern of "Si + past perfect subjunctive (hubiera/hubiese) + past participle verb, + conditional perfect (habría + past participle verb)."

2. Tú no sabías la respuesta. Si me hubieras preguntado, la habrías sabido.
Translation: You didn't know the answer. If you had asked me, you would have known it.

There's a small mistake in your sentence. Instead of "la habrías saber," it should be "la habrías sabido." The verb "saber" needs to be in the past participle form.

3. Julian se sentía bien. Si se hubiera sentido mal, no habría ido a la fiesta.
Translation: Julian was feeling well. If he had felt sick, he wouldn't have gone to the party.

Your sentence is correct. It follows the same pattern as the first sentence.

Remember, in "if . . . then" statements, the "if" part is expressed in the past perfect subjunctive, and the "then" part is expressed in the conditional perfect tense. Keep practicing and you'll get more comfortable with using this pattern!