Simple Infinitive (to) be + V3/ed
Continuous Infinitive (to) be + Ving
Perfect Infinitive. (to) have + V3/ed
Perfect Continuous Infinitive (to) have + been + Ving
Simple Infinitive (to) be + V3/ed
Continuous Infinitive (to) be + Ving
Perfect Infinitive. (to) have + V3/ed
Perfect Continuous Infinitive (to) have + been + Ving