[Grammar] Now I know/knew/have known

[kadioguy]

context:

This grammar is a question to me this morning.

Now is the afternoon.
This grammar is no longer a question to me.
------
Which tense should I say?

1. Now I know this grammar.
2. Now I knew this grammar.
3. Now I have known this grammar.

Or are all of them acceptable?

Thanks!

 

[emsr2d2]

context:

This grammar is a question to me this morning. :cross:
I'm having some problems with this grammar point this morning.

Now is the afternoon. :cross:
Now it is the afternoon.

This grammar is no longer a question to me. :cross:
I no longer have problems with this grammar point.
------
Which tense should I [STRIKE]say[/STRIKE] use?

1. Now I know this grammar. :cross:
2. Now I knew this grammar. :cross:
3. Now I have known this grammar. :cross:

None of them is correct. The present tense is appropriate but say "Now I understand this grammar point".

Or are all of them acceptable? No.

Thanks!

See above.

 

[kadioguy]

How about Now I understood this grammar point or Now I have understood this grammar point?

Are both of them acceptable?

Thanks!

 

[Rover_KE]

No.

Ems told you what is acceptable.