... perspectives on metaphorical variation 2.5 Classification of Grammatical Metaphor Halliday makes a distinction between two main types of grammatical metaphor: There are two main types of grammatical metaphor ... nominalizing a verb) of grammatical metaphor because nominalization plays a key role in creating grammatical metaphor in business letter discourse 38 Implications As we learn and teach academic writing ... grammatical metaphor, and second, the average number of grammatical metaphor instances in each clause and third, types of grammatical metaphor used The numbers of business letters, business letters...