"Would" is a modal auxiliary verb that is used in conditional sentences that express conditions that are contrary to fact. These types of sentences have an "if" clause (which is usually in the subjunctive mood) and a result clause (which contains would).
Examples:
If I were you, I would go to the hospital. (This is a present tense statement, despite the use of the past tense verb "were". In the subjunctive mood, "were" is used for first, second, and third person, plural and singular. The sentence is contrary to fact because it's not possible for "I" to be "you".)
If I were rich, I would travel the world. (Presently, I am not rich.)
Have is already present tense.
I would think so, yes. Because the present tense equivalent of has is is
Knowing is the present participle of the verb know.
"Do" and "does" are in the present tense, the past tense form would be "did".
It is a continuous form of the present tense. "He plays football."
Have is already present tense.
To "maintain" would be in the present tense. "Maintained" would be the past form.
I would think so, yes. Because the present tense equivalent of has is is
Knowing is the present participle of the verb know.
"Do" and "does" are in the present tense, the past tense form would be "did".
It is a continuous form of the present tense. "He plays football."
* I am * you/we/they are * he/she/it is
The word "treat" is a verb in the present tense (unless otherwise used as a noun). The past tense of treat would be "treated". another form of present tense of treat would be "treating" or "treats".
Past tense: Shone Present tense: Shining Future tense: Will Shine
I/you/we/they look. He/she/it looks. The present participle is looking.
"You" is not a verb nor an action, and does not have a present, past, or future tense form.
'Takes' is used in the present tense when using the subjects he, she or it.