Present perfect continuous is formed by - have / has been verb + ing.
have been waiting.
But know is a state verb and state verbs are not usually used in the continuous form eg knowing.
So probably you would never use have been knowing.
I have been knowing him for 15 years is not correct.
I/you/we/they have known. He/she/it has known.
know cause perfect present tense is the way pedophiles rape the little girls and boys they capture in their white vans. i like little girls very much
Perfect progressive/continuous tense have:have/has/had + been + present participlePresent perfect continuous:I have been waiting for two hours. She has been waiting for two hours.Past perfect continuous:We had been waiting for two hours. She had been waiting for two hours.
Know is present tense. Exmpl: I know that the word "know" is present tense The past tense of "Know" is "Knew" Exmpl: I knew that the word "knew" was past tense.
The imperfect progressive tense has two components: the imperfect form of haber and the present participle. Haber is regular in the imperfect tense: había, habías, había, habíamos, habíais, habían The present participle depends on the verb and there are several irregular present participle types (pidiendo for pedir, durmiendo for dormir, etc.) However, because the present participle is the same as the one used in the present progressive, if you know the irregulars from that then there is no need to relearn them here.
I/you/we/they have known. He/she/it has known.
Known is the past participle of know. The present perfect tense of know is have/has known.
Known is the past participle of know. The present perfect tense of know is have/has known.
know cause perfect present tense is the way pedophiles rape the little girls and boys they capture in their white vans. i like little girls very much
Perfect progressive/continuous tense have:have/has/had + been + present participlePresent perfect continuous:I have been waiting for two hours. She has been waiting for two hours.Past perfect continuous:We had been waiting for two hours. She had been waiting for two hours.
I'm not that good in English literature, but as far as i know "still saw" = past perfect tense "still seeing" = present progressive tense hope it helps.....
Know is present tense. Exmpl: I know that the word "know" is present tense The past tense of "Know" is "Knew" Exmpl: I knew that the word "knew" was past tense.
The imperfect progressive tense has two components: the imperfect form of haber and the present participle. Haber is regular in the imperfect tense: había, habías, había, habíamos, habíais, habían The present participle depends on the verb and there are several irregular present participle types (pidiendo for pedir, durmiendo for dormir, etc.) However, because the present participle is the same as the one used in the present progressive, if you know the irregulars from that then there is no need to relearn them here.
The future perfect tense is will have known.
The present tense of 'knew' is 'know'.
Knowing is the present participle of the verb know.
Known is the past participle of know know / knows = present tense knew = past tense known = past participle knowing = present participle