Je crois...

(a)  

Selon moi...

(a)  

Selon moi...

(a)  

En ce qui me concerne ...

(a)  

Je suppose ...

(a)  

J'ai l'impression que ...

(a)  

A mon avis ...

(a)  

Je suis convaincu(e) que ...

(a)  

Je suis convaincu(e) que ...

(a)  

I guess ...

(a)  

According to me ...

(a)  

I feel like ...

(a)  

In my opinion ...

(a)  

I think ...

(a)  

I believe ...

(a)  

As far as I am concerned ...

(a)