Original sentence: , while correct in American English, is incorrect in British, where it should be rendered thus: He took heed that his boss might not see him.In British English, it is considered incorrect to use a negative subjunctive.The following construction is common in American English, and is readily understood:
Edited sentence: However, some exceptions such as the following construction is common in American English, and is readily understood:.In English, it is considered incorrect to use a negative subjunctive.is incorrect and should be rendered thus: He took heed that his boss might not see him