modal verbs, and 3) relative pronouns.
Prator’s(1967) 6 categories of difficulty between the first language and the second language says that there are 6 levels of difficulty by the grammatical or phonological features. The most difficult level to learn is ‘over-differentiation (level4)’ and ‘split (level5)’.
The ‘over-differentiation’ means that a new item entirely, bearing lit
British English.
② Subject-aux inversion in yes/no questions &
tag questions
(5) a. Should I finish that book?
b. Rarely, if ever, will you see a performance
as good as that.
③ Repetition in retorts and tags
(6) You think he can’t do it? Well, he CAN!
④ Invariant form(no present or past tense)
(7) *He canned run a mile in almost four
minutes when he was younger.
or features define the class, as in the example. The phone [x] is a voiceless velar fricative.
a) i u [+high]
e o
a
[-back] [+back]
================================
[+DR]
B ) p ts k
dg [-voice]
f ʃ
a product or service’s ecological impact to a minimum.
Therefore the concept has to cover every stage from the first to the last stage of life cycle of the product, that is, from sourcing, manufacturing, packing, transport to the end of the life, since each phase can influence the environment negatively.
For example, in designing a product, the designing team can change the raw materials