Expression: to be afraid of

[deleted]

English Grammar Tests, Elementary Level

ESL/EFL Test #75 "Adjective Prepositions Constructions", question 2

My son is afraid ......... the dark.

(a) from
(b) on
(c) of
(d) by

English Grammar Tests, Elementary Level

ESL/EFL Test #75 "Adjective Prepositions Constructions", answer 2

My son is afraid of the dark.

Correct answer: (c) of
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my son is afraid by the dark

[Daniela]

Dear learner,
The correct preposition to go with "afraid" is OF: to be afraid of...... BY isn't correct.
Daniela
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English Language Learning Online
Learn English with Daniela

[Alan]

Hi deleted,

You might like to know other words related to afraid of -

Charlie is frightened of flying

Charlie has a fear of flying

If you introduce the preposition by, you then give the idea of the passive:

The children were frightened by the thunder and lightning. This means the thunder and lightning made the children afraid or frightened them.

Alan
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English as a Second Language
You can read my ESL story 'the' vs. 'a/an'