English grammar – Spot the error (choose the part with an error or “No error”). Sentence: We are happy / to know that / the project completed / strictly as per the schedule.

Difficulty: Easy

Correct Answer: the project completed

Explanation:


Introduction / Context:
This item tests grammar and verb form accuracy in a sentence split into four parts. You must identify the segment containing the grammatical error, or choose “No error” if the sentence is correct.



Given Data / Assumptions:

  • The clause refers to a finished action about a project in the past.
  • Standard formal English is required.
  • Each slash-separated chunk represents an option.


Concept / Approach:
Completed actions typically take a passive construction when the subject receives the action. After “know that,” a full finite clause is expected. The noun “project” cannot perform “completed” without an auxiliary unless it is an adjectival participle, which requires different phrasing.



Step-by-Step Solution:

Check Part A: “We are happy” — grammatically correct as a predicate adjective.Check Part B: “to know that” — an infinitive of purpose linking to a content clause; correct.Check Part C: “the project completed” — incorrect. It lacks the necessary auxiliary for a passive or perfect form.Preferred corrections: “the project was completed” (simple past passive) or “the project has been completed” (present perfect passive).Check Part D: “strictly as per the schedule.” — idiomatic in Indian English; acceptable.


Verification / Alternative check:

Substituting “was completed” yields: “We are happy to know that the project was completed strictly as per the schedule,” which is fully grammatical.


Why Other Options Are Wrong:

A and B are standard; D is idiomatic and acceptable. Only C breaks verb-form rules.


Common Pitfalls:

Confusing a past participle used adjectivally with a finite verb form; omitting auxiliaries in passive constructions.


Final Answer:
the project completed

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