When to use QUE and QUÉ

Que is used in Spanish with words that are used to express opinions, desires, feelings, and time and to introduce subordinate phrases:1. Estoy seguro or segura (remember gender in Spanish), que mañana lloverá. 2. Pienso que eres una persona bien inteligente (I think you are a very intelligent person) 3. Me alegro que (or de que) I am happy that. 4. To express exclamatory sentences-exclamations: ¡Qué bien/bueno! (That's good/great!) ¡Qué bonitas! How lovely...and so forth..Que also introduces the subordinate clause...