are these forms correct?

[allthewayanime]

Are these forms correct:

I am thinking about it all day.
I am thinking of you all the time.
I've been thinking about it all day.

[5jj]

The second and third are fine. The first does not sound very natural to me.

[allthewayanime]

So the first one should have been with the present perfect?

[billmcd]

Are these forms correct:

I am thinking about it all day.
I am thinking of you all the time.
I've been thinking about it all day.

"Think" is a stative verb which, by rule, is not used in present continuous form. So, in your #''s 1 & 2 "think" is not used correctly. #3 is OK.

[5jj]

"Think" is a stative verb which, by rule, is not used in present continuous form. So, in your #''s 1 & 2 "think" is not used correctly. #3 is OK.

If you are actively engaging in thought, then 'think' is not being used statively. so #2 is fine. Other correct examples:

I am thinking of leaving Prague.
Be quiet. I am thinking.

[billmcd]

The second and third are fine. The first does not sound very natural to me.

#2: Well, the combination of the present continuous form with "all the time" doesn't sound natural to me. I would rather, "I think of you all the time".

[5jj]

#2: Well, the combination of the present continuous form with "all the time" doesn't sound natural to me. I would rather, "I think of you all the time".

We are in the area of personal preference here. Both forms are fine - in BrE, at least. The progressive form emphasises the duration, the on-goingness, of the process,

[Alamshar]

So the first one should have been with the present perfect?

You can use the verb "think" with the present perfect but it depends on what you want to say . I would use the present perfect continuous: "I've been thinking about it all day". The fact that it's today makes it a very recent action and therefore "I've thought about it all day" does not sound right

[5jj]

You can use the verb "think" with the present perfect but it depends on what you want to say . I would use the present perfect continuous: "I've been thinking about it all day". The fact that it's today makes it a very recent action and therefore "I've thought about it all day" does not sound right

Once again, both forms are possible; it's a matter of personal choice. Once again, the progressive form emphasises the duration, the on-goingness, of the process; it also suggests the possibility that the thinking is continuing at the moment of speaking.

[Barb_D]

In the right context -- a new, temporary, and pressing situation -- even the first one could work.

I am so stuck on this problem. I am thinking about it all day. I'm even dreaming about it at night.It's been almost two weeks, and I still can't come up with the solution!

All this "thining" is new, it's temporary, it's current, and it's urgent. In this conext, the present progressive works.