• Not OK: We come at school every morning.
• Say: We come to school every morning.

(b) At.

• Not OK: Chewbacca is standing to the door.
• Say: Chewbacca is standing at the door.

To and Till.
(a) To.

• Not OK: Jar Jar walked till the river and back.
• Say: Jar Jar walked to the river and back.

(b) Till.

• Not OK: The Jedi will stay here to next month.
• Say: The Jedi will stay here till next month.

Use to with distance, and till (until) with time

In and At.
(a) In.

• Not OK: Bail Organa has a flat at Alderaan.
• Say: Bail Organa has a flat in Alderaan.

(b) At.

• Not OK: Yoda is staying in the Galactic City.
• Say: Yoda is staying at the Galactic City.

In and Into.
(a) In.

• Not OK: Qui-Gon Jinn spent all the day into his room.
• Say: Qui-Gon Jinn spent all the day in his room.

(b) Into.

• Not OK: Padme came in the room and sat down.
• Say: Padme came into the room and sat down.