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Rule "Progressive forms of non-progressive verbs (doubt, believe, understand)"

This is one of many errors that LanguageTool can detect.

Description:	Progressive forms of non-progressive verbs (doubt, believe, understand)
Message:	The verb '\3' can be stative. If '\3' describes a state, change the sentence structure and use the base form of the verb.
Category:	Grammar (ID: GRAMMAR)
Link:	https://learnenglish.britishcouncil.org/en/intermediate-grammar/stative-verbs
Incorrect sentences that this rule can detect:	I am unfortunately lacking the courage to act. I have all the REST wrapper stuff done in c# but am lacking the all important group information. I am lacking all three right now so it was a disastrous choice to pick that style. The only data point I am lacking at this point relates to our East Power slide. I was able to secure a Duns# and Fed Tax ID, however, I am lacking Fax and bank account numbers. The only thing that I am lacking is being able to control the Keypads. I think that I am not fitting for this work.
Correct sentences for comparison:	I unfortunately lack the courage to act. I think that I am not fit for this work. Don't you think I am astonishing? I think I am rather astonishing, even if you don't think I am. As I speak, I am astonishing the crowds with my daring trapeze act. Yes, I am surprising. I am surprising. I am often surprising, aren't 1? But, that's why you love me. I am not surprising; I am just an old bore. In this video, you can see that at the same time that I am fitting the cover to the unit, I am pushing the backplate towards... Next week, I am fitting sensors in the rear rooms of the house and in the hallway. I am also fitting AGA to an ARIMAX model. I am lacking in confidence. This is one genre I am sorely lacking in exposure to. I am equally lacking in skill in that arena.
ID:	PROGRESSIVE_VERBS [2]
Version:	6.8-SNAPSHOT (2025-10-26 22:33:08 +0100)