Wake up vs be awake

[Romina]

English Grammar Error, Intermediate level

ESL/EFL Test #18 "Prepositions and Phrasal Verbs", question 7

I awoke up when I heard the sound of the explosion caused by the fire at the oil refinery.

(a) awoke up
(b) heard
(c) caused

English Grammar Error, Intermediate level

ESL/EFL Test #18 "Prepositions and Phrasal Verbs", answer 7

I woke up when I heard the sound of the explosion caused by the fire at the oil refinery.

Correct entry: woke up
The error was: (a) awoke up
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I need your help,thank you.

[Alan]

Hi,

There are two constructions here: wake up and be awake.

Wake up is simply stop sleeping as in: They always wake up early to catch the first train in the morning.

Be awake means simply not be asleep.

They were awake for a long time in the night because the wind and rain made such a loud noise.

The past forms of wake are woke and woken.

Hopeful of helping

Alan
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English as a Second Language
You can read my ESL story Prepositions