A
Use when:
The weather was bad. We visited the national park.
We visited the national park when the weather was bad.
Use before:
We bought some souvenirs. We returned to the hotel.
We bought some souvenirs before we returned to the hotel.
Use as soon as:
We left the airport. We took a taxi to the hotel.
As soon as we left the airport, we took a taxi to the hotel.
Use after:
I went to bed. I packed my things.
I went to bed after I packed my things.
Use when (you can reverse the clauses):
It was the end of the afternoon. We left the island.
We left the island when it was the end of the afternoon.
Use while (two options work):
We waited at the hotel. It rained heavily.
It rained heavily while we waited at the hotel.
Use as soon as:
We arrived at the hotel. We unpacked our luggage.
As soon as we arrived at the hotel, we unpacked our luggage.
Use when:
He had breakfast. He started his journey.
He started his journey when he had breakfast.
Use after:
She bought a ticket. She entered the museum.
She entered the museum after she bought a ticket.
Use before:
They checked in. They hung out at the lobby.
They hung out at the lobby before they checked in.
Use after:
We finished lunch. We visited the temple.
We visited the temple after we finished lunch.
Use until:
We waited. The bus finally came.
We waited until the bus finally came.
Use as soon as (the order can switch):
Dad started the car. The rain stopped.
As soon as Dad started the car, the rain stopped.
Use before:
I left home. I called my friend.
I called my friend before I left home.
Use when:
We reached the beach. We saw a beautiful sunset.
We saw a beautiful sunset when we reached the beach.
Use after:
We checked in. We went straight to the swimming pool.
We went straight to the swimming pool after we checked in.
Use while (two correct orders)
She was packing her luggage. She watched TV.
She watched TV while she was packing her luggage.
Use when:
The plane landed. Everyone clapped.
Everyone clapped when the plane landed.
Use as soon as:
The store opened. We bought souvenirs.
As soon as the store opened, we bought souvenirs.
Use when (normal order):
The guide arrived. The tour began.
The tour began when the guide arrived.
Use before (both orders acceptable)
They went to bed. They planned their trip.
They planned their trip before they went to bed.
Use after (reverse order possible)
We returned from our trip. We washed our clothes.
We washed our clothes after we returned from our trip.
Use until:
The children played at the beach. The sun went down.
The children played at the beach until the sun went down.
Use while (both orders acceptable):
We walked through the market. We took a lot of pictures.
We took a lot of pictures while we walked through the market.
Use as soon as:
The taxi arrived. We loaded our luggage.
As soon as the taxi arrived, we loaded our luggage.