Informal way of expressing your opinion:

• I think
• I believe
• I reckon

Formal way of stating your opinion:

• In my opinion
• In my view

More formal way of expressing your view:

• It is believed that...
• It is thought that...

More phrases to voice your opinion:

• I'm convinced that - very strong feeling that you are right
• I've always held that - used for very firm beliefs
• I maintain - insist in believing
• I feel - strong personal opinion
• I reckon - informal, usually an opinion on what is likely to be
• I doubt - don't believe
• to my mind - fairly informal
• If you ask me - informal
• I am of the same mind = I agree
• I am relanctant to draw conclusions = I am no sure about...
• I am still troubled = I am worried
• I have a hunch = I strongly susupect
• I have a different take on it = I diagree
• I was immediately struck by = I was surprised
• I still hold out hope = I am optimistic
• I think you have to take it as a given = it is acceptable to think that...
• I was taken aback = I was completely surprised
• I lean forward = I think there is more truth in the idea
• I go along with = I have the same idea
• I was won over = I was convinced
• I point to = I regard
• I am puzzled over = I am confused
• I rule out = I say no
• It is written off = it is dismissed
• I bear out = I confirm
• I fathomed out = I understood

Mind the prepositions that are used with the words to state opinion:
a view on smth/smb
to think of smth/smb
to be in faivour of smth/smb
to have doubts about smth/smb

Modal Verb to express opinion:
-used to make the statement less definite
-used for recommending or advising

• would
• should
• could
• might

Statement expressing facts vs opinion
1. 50,000 will die - expressing fact
2. 50,000 might die - expressing opinion

1. I do not think that small amounts of sunlight increase the risk of cancer - expressing opinion
2. Small amounts of sunlight do not increase the risk of cancer - expressing fact

1. I believe that vitamin D deficience might become common among adults - expressing opinion
2. Vitamin D deficiency will affact 25% of adults - expressing fact

Adjectives to describe smb's beliefs:

• fanatical=obsessive
• eccentric=odd
• conservative=traditional
• middle-of-the-road=moderate
• dedicated=committed
• firm=strong