In Plurals^x, Adverbs^x, Inflections^x

Hi everyoneI just wondered if anyone could help - I have to write a profile of a chinese learner of English (completely made up). In it I must put any difficulties that the learner has in learning English as an L2. I have got so far:Intonation transfer from L1 may cause them to be perceived as...

1) Derivation often changes the word's lexical category, but not always: great (adjective) => great+ly => greatly (adverb) dog (noun) => dog + house => doghouse (noun) 2) Inflection doesn't change the word's lexical category. It adds meaning: number, person, tense: Number: dog (singular noun)...