"Ce que" (pronounced "suh kuh") refers to a thing or an idea. It's used when the relative clause is the *object* of the main verb.
"Qui" (pronounced "kee") refers to a person or people. It's used when the relative clause is the *subject* of the main verb.
Here are some examples:
"Ce que"
* J'aime ce que tu fais. (I like what you do.) "Ce que" refers to the "thing" (your actions) that the speaker likes.
* Je ne comprends pas ce qu'il veut dire. (I don't understand what he means.) "Ce que" refers to the "idea" (his meaning) that the speaker doesn't understand.
"Qui"
* Les amis qui m'ont aidé sont formidables. (The friends who helped me are awesome.) "Qui" refers to the friends, the *subject* of the verb "ont aidé."
* Le professeur qui explique bien est très populaire. (The professor who explains well is very popular.) "Qui" refers to the professor, the *subject* of the verb "explique."
Here's how you can use them to describe friends or likes:
Friends:
* Mes amis, qui sont toujours là pour moi, sont précieux. (My friends, who are always there for me, are precious.) "Qui" refers to the friends, the subject of the verb "sont."
* J'apprécie ce que mes amis font pour moi. (I appreciate what my friends do for me.) "Ce que" refers to the actions (what they do) that the speaker appreciates.
Likes:
* J'aime ce qui me fait rire. (I like what makes me laugh.) "Ce qui" refers to the things that make the speaker laugh, the object of the verb "aime."
* La musique qui me relaxe est la meilleure. (The music that relaxes me is the best.) "Qui" refers to the music, the subject of the verb "me relaxe."
Remember, "qui" is for people, and "ce que" is for things or ideas. This distinction will help you use the correct relative pronoun in your sentences!