23. I think と思います

• This goes at the end to show that you believe what you say, but are not 100% sure.
• It is also used to show one’s opinion. 
• It is also used to soften one’s (otherwise harsh) opinion.
• If there is desu, change it to da which is the more casual form and add to omoimasu.

Here, the speaker is not certain of the accuracy of his info:

熊のプーさん　は　くま だ　と　思います。
kuma no pu-san wa kuma da to omoimasu.

Winnie the Pooh is a bear, I think…

Next is an example of showing one’s opinion.  It is true for the speaker, but may not be so for the listener:

なっとう　は　おいしい　と　思います。
nattou wa oishii to omoimasu.
I think Natto is delicious.