Identify the part containing a grammatical or structural error:
It is high time you start studying seriously.
Show answer & explanation
Correct answer: D
Explanation
When using the phrase "It is high time" (or "It is time") followed by a subject, the verb must be in the Simple Past Tense. This is used to indicate that something should have happened already and is now overdue.
The word "start" should be changed to "started."
Correct Sentence: It is high time you started studying seriously.