Languages are natural forms of communication; children quickly learn to communicate using their native language, and soon master the main rules of grammar or syntax without being taught. Indeed, we cannot communicate efficiently if we do not master the essential principles of grammar or syntax. If we imagine language as a big highway, the road and the cars are the words, but the grammar is the road signs and markings that tell the cars and lorries where to go and how to drive. Without roadsigns, a big highway would quickly descend into total confusion
