In the sentence given below, four words/phrases have been underlined and the underlined words/phrases are given as options. Select the option that contains grammatical error(s).
$\underline{\text{Raghav has been}}$
$\underline{\text{trying stopping smoking}}$
$\underline{\text{for many years}}$
$\underline{\text{now, but he has been unsuccessful.}}$
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When using the verb "try," the correct form after it is "to + verb" (e.g., trying to stop, not trying stopping).
The error lies in the phrase $\underline{\text{trying stopping smoking}}$.
The correct sentence should be: "Raghav has been trying to stop smoking for many years."
The construction "trying stopping" is incorrect; it should be "trying to stop."