mustn't is short for 'must not'. '
must is a modal auxiliary verb and is used in connection with strong obligation and freedom to act.
'must not' is a prohibition. It is command, an instruction, a restriction on freedom to act: "Students must not copy other student's homework."
So 'mustn't' is a prohibition, concerning the present and the future.
But 'have (+ past participle)' is speaking about something that has happened in the past. It refers to a finished, completed matter.
e.g. "I have ordered tomato soup."
NOTE: It is impossible to prohibit something from happening which has already happened!
So constructions such as 'must not' + 'have done' do not make any sense!
Rather than use 'mustn't' there are several more suitable modal auxiliary verbs we can use if we want to talk about a finished past event.
If you want to use 'mustn't' to prohibit something happening, it is used with the 'present simple' verb form.
e.g.
The Spanish word "brillando" translates to "shining" in English. It is the present participle form of the verb "brillar," which means "to shine."
The past participle of bring is brought, and the present participle is bringing.
The present participle is taking.
The present participle form (or -ing form) of "aware" is "being aware." In English grammar, the present participle is formed by adding -ing to the base form of the verb. In this case, "aware" is an adjective, and when transformed into a verb form, it becomes "being aware."
"Am" is the present participle.Present participle is the ing form of the verb and for am that is being
The past participle of the verb to get is gotten.
The past participle form of "get" is "got" in British English and "gotten" in American English.
No. "Running" is a present participle. (As far as I know, no past participle in English ends in the letters "ing").
The third form of "think" is "thought." In English, "think" is the base form, "thought" is the simple past and past participle form, and "thinking" is the present participle.
No. -ing is used for the present participle.
Yesterday is considered the simple past tense in English, as it refers to a specific time in the past. The past participle form of "yesterday" would be "yesterdayed," which is not a commonly used or recognized term in English grammar.
The past participle of 'prove' is 'proved'. The form 'proven' is also found and is acceptable. It is used particularly in Scots law, in the verdict 'not proven'.
Have been or Has been IS the past participle......it is equivalent to "was".
Formed is the past participle of form.
The word "stolen" is a verb form, or an adjective, and has no plural.
The "participle tense" is not a standard term in grammar. However, a participle is a form of a verb that is used to modify a noun or pronoun, often indicating the present or past participle form in English. It can be used to create various tenses in conjunction with auxiliary verbs.
The Spanish word "brillando" translates to "shining" in English. It is the present participle form of the verb "brillar," which means "to shine."