A. He is tall as I am.
B. He can run fast as I can.
C. He can sing as She can.
Are the sentences above grammatical? I used as instead of as...as construction. What are the meaning of these sentences? I think A means I'm tall and so is he. B means that I can run fast and so can he.Here how fast we can run aren't compared,it simply means we both can run fast. C means either He can sing the way/how she can sing or She can sing and so can he.I can't understand the meaning clearly. I'm so confused. Please clear my confusion.