Using prêt
Hi all. I have a basic understanding of using prêt, but have really never used it in my practices. I have a few questions, mostly about the use of verbs.

Je pense qu'il est prêt.

I know there is a feminine form of prêt (prête), so if I wanted to say that I think that she is ready, would I say:

Je pense qu'elle est prête. ?

My main question is, how would I use prêt with a verb? I've seen a few examples online where "à + infinitive" is used. *the following are my examples so please correct me*

I am ready to leave now. - Je suis prêt à partir maintenant.
I am ready to sing. - Je suis prêt à chanter.

how about if I wanted to say:

Are you ready to go? *Es-tu prêt à aller* Is this correct?

Merci!

Question

Using prêt
Hi all. I have a basic understanding of using prêt, but have really never used it in my practices. I have a few questions, mostly about the use of verbs.

Je pense qu'il est prêt. 

I know there is a feminine form of prêt (prête), so if I wanted to say that I think that she is ready, would I say:

Je pense qu'elle est prête.  ?

My main question is, how would I use prêt with a verb? I've seen a few examples online where "à + infinitive" is used. *the following are my examples so please correct me*

I am ready to leave now.  - Je suis prêt à partir maintenant.
I am ready to sing. - Je suis prêt à chanter.

how about if I wanted to say:

Are you ready to go?  *Es-tu prêt à aller*  Is this correct? 

Merci!

Answer

Your last example is incorrect because the verb 'aller' requires an indirect complement (unless used in the imperative mode).  You can either say:

Es-tu prêt à partir? or
Es-tu prêt à y aller? (Are you ready to go [there].)

Note that 'y' doesn't have to be a specific place if your intended meaning is to leave from a place where you're done whatever it was that you were doing.

For example: 'On y va?' or 'Allons-y' mean 'Shall we go?' and 'Let's go' respectively but doesn't necessarily indicate a specific location to go to.

Hope that helps.

P.S. My dialect is Canadian French.

Answer

Well, for all the examples that you have given in the original message, I do not see anything wrong in general, although for a French speaking person, he/she may have a different opinion.

In my personal point of view, the general usage of "ready" would be, 
to be ready = être prêt (m)/prête (f) 
to be ready to do... = être prêt(e) à faire...

However, there is also a French verb "prêter", which means "to lend (money, object)", as seen in, 
http://www.wordreference.com/fren/pr%C3%AAter

Good weekend. / Bonne fin de semaine.