why passive voice is not possible for the sentences that have infinitive verb like eg. He tries to speak english
Dear student,
Passive voice has three elements: a verb in past participle; a form of the verb 'to be'; and an implied (or direct) 'by someone or something'.
The given sentence can be changed to passive: To speak/Speaking English is tried by him.(It is tried by him to speak English.) (The main verb that is to be changed is 'tries', not 'to speak'.)
If the verb is intransitive, the sentence cannot be changed to passive. For example: He tries hard.
Regards
Passive voice has three elements: a verb in past participle; a form of the verb 'to be'; and an implied (or direct) 'by someone or something'.
The given sentence can be changed to passive: To speak/Speaking English is tried by him.(It is tried by him to speak English.) (The main verb that is to be changed is 'tries', not 'to speak'.)
If the verb is intransitive, the sentence cannot be changed to passive. For example: He tries hard.
Regards