Expressing opinion

I think/feel/believe/reckon that

I strongly believe that

In my opinion /view,

The way I see it,

It seems/appears to me that

To my mind,

I(do not)agree with/that

As far as I am concerned,

I completely/fully agree with (the idea/suggestion) /that...

I am totally against

I strongly disapprove of

I fully support

I am entirely in favour of

It is my firm belief that

As for me,

I consider

I tend to believe

From my point of view

I am inclined to say

If you ask me,

Personally,

From what I know,
To the very best of my knowledge

To my way of thinking

I for one,

I know for fact that

Agreeing

I agree with you up to the point (but don't you think...)

I partially agree with you

I am inclined to agree with you

I completely/fully agree with you/with what you're saying

I fully support your point of view

I am entirely in favour of what you're saying

I couldn't agree with you more

You're quite/absolutely right/true!

Disagreeing

I am afraid I have to differ

I'd like to express my opposition to what you have said

I'd like to object

I have to take issues with you on that

I fail to see the point of what you've said

Contrary to what you've said, I...

I'm totally against the idea of/to...

I totally/strongly/fully disapprove of ...; I completely disagree

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