I've just saying (to him) I think the weather conditions will changing soon.

[altiwife]

Correct me if I made a mistake. Thanks.
a. I've just saying (to him) I think the weather conditions will changing soon.
b. I've just saying, weather conditions are expected to change soon.

 

[GoesStation]

You can't use the present participle after "I've". You can write "I've just said I think weather conditions will change soon." There are few cases where that would be natural though. Usually you'd write "I just said...."

 

[emsr2d2]

Please correct [STRIKE]me if I made a[/STRIKE] any mistakes. Thanks.

a. I've just been saying (to him) that I think the weather conditions will change/be changing soon.
b. I've just been saying, "The weather conditions are expected to change soon".

See above.

You can't use "I've just saying ...".

I just said ...
I've just said ...
I was just saying ...
I've just been saying ...