当然可以用英语表达为：1、of course 一定，当然。2、sure 确信的；可靠的；必定的；当然；的确；当然。3、by all means 一定，务必；尽一切办法。
You could certainly make a case for this point of view.
You can of course help by giving them a donation directly.
"Can I come and have a look at your house?"—"Yes, by all means."
"Can I just say something about the game on Saturday?"—"Yes, of course you can."
"Of course we can, George," she cried.
I can certainly manage May 14th.
Sure. Everyone is bringing his wife.
I can certainly add that to the form.
You can certainly expand the set, but be careful.
You certainly can help yourself!