The boy told a lie lest he should not be punished.
Show Hint
When using “lest,” it is followed by the verb in the past tense or "should" in negative sentences. Alternatively, "so that" can be used to indicate purpose.
Step 1: Identifying the Error.
The sentence “The boy told a lie lest he should not be punished” uses the wrong conjunction “lest” in the context. The word "lest" is used to indicate a negative purpose, but it should be followed by the verb in the past tense or should use "should" in the correct form.
Step 2: Correcting the Sentence.
The corrected sentence is:
The boy told a lie so that he would not be punished. Final Answer:
\[
\boxed{\text{The boy told a lie so that he would not be punished.}}
\]