esperar+a+infinitivo /que subjuntivo: dar tiempo a que algo suceda antes de hacer otra cosa. [Véase también esperar que + indicativo/subjuntivo].
-Esperaba conocerla en persona — He was hoping to meet her in person
→Esperaba a conocerla en persona — He was waiting to meet her in person
-No esperes estar convencido al 100%, siempre hay dudas — Don't expect to be 100% convinced. There are always some doubts
→No esperes a estar convencido al 100% antes de actuar — Don't wait until you're 100% convinced before you act
-Esperan que llegue pronto — They expect him to arrive soon
→Esperan a que llegue antes de empezar — They're waiting for him to arrive before starting
-¿Qué esperas? — What do you expect?
→¿A qué esperas? — What are you waiting for?
