Yeah you can say that or you can also say I can believe
No. "You must believe it" or "you need to believe it" is a better phrase.
Proper grammar and English, I believe.
I believe the question you should be asking is, how do I speak proper english?
I believe there are 7 in the English language. Common Proper Collective Abstract Compound Count Mass :)
English is a proper adjective.
The word English is not a proper noun when it is used as a proper adjective. That is an English accent, an English type automobile, an English looking top hat.
I don't believe that there are any proper English words that fit this criteria.
What is "do writing?" This does not appear to be proper English. If the question were rephrased in proper English, I think we would know how to answer it.
Not everyone here knows proper English. Others may be lazy and use chat speech. Then of course, some are just young. In addition, there is some debate as to what is proper English. Proper British English is not the same as proper American English. Other English-speaking nations have their own variations of English.
Well, for starters, your question is not proper english.
I believe English & Scottish I believe English & Scottish
No, "irregardless" contains a double negative. "Regardless" is proper English, but "irregardless" is not.