Either would be appropriate depending on context.
the synonym for skilled might something along the lines of unskilled.
Being proficient at doing something.
qualifié - compétent
"The money you get for selling something" can be expressed by using the words "payment", "revenue", or "proceeds".
you can say something could effect this
all you say is "I love using paperclips" or "Do you like using paperclips" something like that
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.
i parachuted out of a plane, i had to say something stupid though.
Say "Xbox off" or something simular
To go camping out in the wilderness, you have to know the basic survival skills.
Well, you could say something describing a stereotype, then say "is a stereotype of" what ever the stereotype is. Or you could say something like "Jimmy sure is to the exact likeness of an American stereotype."
No. When you say you have seen something, you are using present perfect tense.