Jeanette: Of course Tarot can predict the future. But of course, in many instances, this future can be changed. The Tarot cards can indicate to us what can be changed and what can't.
Example: a spread that reveals that someone won't be pregnant in a year, but desperately wants to, can reveal that it is precisely this desperation and stress that is preventing her falling pregnant. So you explore different avenues with her in order for her to let go of her stress. And that can change the outcome. (Sometimes outcomes can't be changed, of course, and then one can work on how to deal with this.)
Pregnancy prediction spread: past, present, future. But if you insist, you can throw in an advice card to shed more light.