Answer:
1. Les vas a dar muchos regalos a tus padres.
- Vas a <em>darles </em>muchos regalos a tus padres.
2. Quiero comprarles unos guantes a mis sobrinos.
- <em>Les</em> quiero comprar unos guantes a mis sobrinos.
3. Clara va a venderle sus libros de literatura francesa a su amiga.
- Clara <em>le</em> va a vender sus libros de literatura a su amiga.
4. Los clientes nos pueden pagar con tarjeta de crédito.
- Los clientes pueden pagarnos con tarjeta de crédito.
Explanation:
This exercise is about indirect object pronoun alternative placements. Keep reading in order to master this point of grammar.
1. You will give your parents many presents.
What we have to do first is <u>identify</u> the indirect object pronoun. <em>A tus padres </em>is the indirect object in the form of the third person plural, meaning it takes the pronoun les. Once it is identified (at the beginning of the sentece) we must now look for <u>an infinitive form</u>. Indirect object pronoun is then glued onto the infinitive form and what we get is: <em>darles</em>.
2. I want to buy my nephews some gloves.
In the second sentence we have the inverse case. This means we should look for an infinitive form in order<u> to find the right indirect object pronoun.</u> Here it's the verb <em>comprar </em>and we have comprarles - <em>to buy </em><em>them</em>. We dissociate the pronoun and <u>place it in front of the conjugated verbal form.</u> It is very important to know that the pronouns are put <em>in front </em>of conjugated verbs. This way the correct alternation would be: <em>les quiero.</em>
3. Clara is going to sell her French literature books to her friend.
The same action should be performed as in the last sentence. First and foremost identify the infinitive form: <em>venderle.</em> Dissociate the pronoun from it: <em>le</em>. Find the conjugated verb: <em>va. </em>Place the pronoun <u>in front of the conjugated verb:</u> <em>le va.</em>
4. The clients can pay us with a credit card.
This last alternation to be performed is similar to the first one: we must identify the indirect object pronoun (it should be placed, as we can now be sure, <em>in front of the conjugated verb</em>):<em> </em><em>nos</em><em> pueden pagar</em>. We then search for an infinitive form to glue it onto. The infinitive is <em>pagar </em>and what we have here is <em>pagarnos. </em>