If we learn from outdated books,we may not be able to copy with new waves of information.

There's only one letter missing! If we learn from outdated books, we may not be able to cope with new waves of information. Can you see it?

Hi Ng, Your sentence consists of two clauses -- a main clause (containing a main idea) and a subordinate clause (containing a dependent idea). The main clause is: we may not be able to cope with new waves of information. The subordinate clause is: If we learn from outdated books A subordinate clause cannot stand on its own as its meaning is incomplete. It needs a main clause to complete its meaning. In contrast, a main clause provides a complete meaning, even on its own. Whenever we start a sentence with a subordinate clause, we need a comma (,) before we continue with a main clause. Hence, your sentence becomes: If we learn from outdated books, we may not be able to cope with new waves of information. *Two more punctuation rules are: (i)the first word of a sentence starts with a capital letter (ii) a sentence ends with several possible punctuation marks (. or ? or !). However, a sentence can never end without a punctuation mark. Hope this helps. Cheers, Lance