The French future tense has two English equivalents;
I will play, we shall play, I will be playing, we shall be playing

To form them just add the specified endings bellow onto the complete infinitive, removing only the -e off -re verbs.

These are common for most verbs, but here are some stems that do not follow the pattern in the future tense.

Try putting mordre into the future tense. Remmember to remove the -e before adding the ending