No. A company is not a person. In fact the whole concept of a company is to protect persons who have invested in a business behind a legal barrier for financial and legal protection. So it should be "he company which is doing something"
No, The correct grammar for this sentence would be, "He finished doing his homework."
no it is not correct to say you are not for sure instead you can say in proper English that you are not sure about something
It is not correct to say it exactly that way, but it would be correct to say, "We warmly welcome you to our company." In this case, "warmly" is an adverb modifying "welcome" used as a verb. It would also be correct to say, "We would like to extend a warm welcome to our company." In this case, "warm" is an adjective modifying "welcome" used as a noun.
Dead on, yes.
When something bad happens we say "What bad luck!"We do not say "What a bad luck!" because that is not correct in normal English usage.
Yes assuming you are about to say a company that does something.
The correct phrase is "have difficulty doing something." For example, you would say, "I have difficulty understanding math." The structure indicates that you struggle with the action of doing something, using "doing" as a gerund.
Yes, "on your own" is a correct phrase to use when referring to doing something by yourself without any help or assistance.
Better to say "The company is in the red." or "The company had a net loss for the year." "Made a loss" sounds a little like something you would do in the bathroom!
No, the correct phrase is "keen on doing something" without "to." For example, you would say, "I am keen on learning new languages." Using "to" in this context is grammatically incorrect.
No. It should say "How is Fred Martin doing?"
Well if you did something wrong to a person, yes please apologize. No one has ever choked to death from swallowing pride.
yes
No, The correct grammar for this sentence would be, "He finished doing his homework."
No. The correct way to say that you disagree with something would be "in disagreement."
No, the correct phrasing is "Did you say something?" The word "said" should be changed to "say" to make the question grammatically correct.
no it is not correct to say you are not for sure instead you can say in proper English that you are not sure about something