Normally, the verb rendre means to give something that you owe to someone, such as On rend ses devoirs au professeur.  It can also be used in the sense of to represent.  But rendre + adjective means to make someone or something + adjective.

Tu me rends si heureuse!  You make me so happy!
Le fait qu'il ne possède pas de voiture le rend triste.  The fact that he doesn't have a car makes him sad.

C'est vs. Il est

To Live

The past participle of vivre is vécu. Habiter is another verb that means to live, but it means to live in a place.  Vivre is used to mean the state of being alive.  A subjunctive form of vivire, vive, is often used in exclamations. Vive la France!  Long live France!

Object Pronouns

Note:  You have already learned the subject pronouns.  They go before the conjugated verb forms.  The Direct and Indirect Object pronouns go before the verb even though in English they go after it.  They also go after the ne in a negative sentence and right before the verb. The disjunctive always go after prepositions, or can be used alone for emphasis.

Sample Sentences:  

Note:  When you have more than one pronoun; me, te, nous, or vous come first, then le, la, or les, then lui or leur.  Me, te, le, and la contract to m', t', and l' when they precede a vowel, the same way je does.  In commands, the pronouns go after the verb, connected with a hyphen.  And the pronoun order changes a little too:  Le, la, or les come first; then moi, toi, (Me and te become moi and toi in commands) nous, or vous; then lui, or leur.

If you have pronouns, they go before the complete verb in regular sentences; but after the ne and before the form of avoir in negative sentences.

In the passé composé with avoir, direct object pronouns only must agree in gender and number with the past participle.

Note:  Add an e if the pronoun is feminine, and an s if it is plural.  The l' could mean him or her, so you might not need to put the extra e on the past participle.  The same for nous and vous.  They must have an s because they are plural, but it is unclear as to whether they are masculine or feminine.