The present tense of 'knew' is 'know'.
The present perfect tense of clean is:I/You/We/They have cleaned.He/She/It has cleaned.
The present progressive tense of investigate is:I am investigating.You/We/They are investigating.He/She/It is investigating.
It is "clean/cleans".
Annoying can be an adjective or a present tense verb - but not a noun.
The word 'devastating' is the present participle, present tense of the verb to devastate. The present participle of the verb is also a gerund, a verb form that can function as a noun. The present participle of the verb also functions as an adjective.The noun form of the verb to devastate is devastation.
"Know" is present tense. The past tense of "know" is "knew."
The past tense is 'knew'.
Know is in the preset tense eg I know the answer to this quetion Knew is the past tense eg I knew the answer to that question
"Knew" is the past tense of "know." In the present tense, you would use "know" instead. For example: "I know the answer."
Known is the past participle of know know / knows = present tense knew = past tense known = past participle knowing = present participle
The present tense of "know" is "knows" for third person singular (he, she, it) and "know" for all other subjects (I, you, we, they).
know is present, knew is past.Knows can also be present. ( ex. She knows the answer.)
The verd "to know" in an infinitive and doesn't have a past tense. However, the word "know" can be used in the form "I know" which in normal grammar is considered the present tense. In that sense the past tense would be "I knew". So the past tense of "know" would be "knew".
There is no past tense of knew. It is the past tense of know.
'is' is a present tense
The verb is is the present tense.
The past tense of "know" is "knew."