In AE in the past tense we say "should have tucked in..."Hi j29682896, "tuck" in your sentence is an example of the use of the English subjunctive mood, which is gradually falling out of use. As explained here (source: englishpage.com), it is used after the following verbs: to advise (that), to ask (that), to command (that), to demand (that), to desire (that), to insist (that), to propose (that), to recommend (that),
to request (that), to suggest (that), to urge (that) and others.
Interestingly it is still used more in AE than in BE, and in this kind of context, there are often ways of avoiding it.
Note too (from the same linked page) "After many of the above expressions, the word "should" is sometimes used to express the idea of subjunctiveness. This form is used more frequently in British English and is most common after the verbs "suggest," "recommend" and "insist."
So in BE we could also say "... insisted that his son should tuck ... into his trousers."
None of those work, because none of those are subjunctive mood.Thank you for your replies!
Does it also work on other verbs? Such as,
Mr. Lee said that his son go to school.
Mr. Lee told us that his son like to play basketball.
Mr. Lee guessed that his son tuck his shirt into his pants.
Mr. Lee believed that his son tuck his shirt into his pants.