Direction: In the following questions, some parts of the sentences have errors and some have none. Find out which part of a sentence has an error. The number of that part is your answer. If a sentence is free from error, then your answer is (4), i.e. No error.
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					 Solve the question according to given instruction
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                        - The train will not start
- until the guard
- will blow the whistle.
- No error
 
Correct Option: C
blows the whistle will replace will blow the whistle because – 
will is not used in a Conditional Clause, Simple Present Tense is used. 
Look at the examples given below :  After until we use Present Tense to talk about the future.
After until we use Present Tense to talk about the future. 
Hence, blows the whistle is the right usage.
 
	