There are two basic reasons to add -ing to the end of a verb: to form one of the progressive tenses or to make a gerund. as for the to thing I'm not to sure what your asking
In the introduction to his book great astronomers, Robert stawell all develop and refine the central idea in his book by providing biographical information by specific astronomers and their discoveries. With it, he also connect it to their contributions to the history of great men
hope this helps
Answer:
The answer is C. I believe...
Answer:
A usefull invention is the hose the light bulb and glasses
Explanation:
I hope this helps sorry if it doesn't.
A.knowledge or understanding
