The verb aller is irregular in form. Look at the conjugation: je vais, tu vas, il/elle va, nous allons, vous allez, ils/elles vont. When using the verb aller with an INFINITIF (whole verb), you can express an event that is going to occur in the near future. This construction is called "le futur proche". For example: Paul va jouer au tennis. Paul is going to play tennis.