based on some theories; 1) tense and aspect, 2) 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-differentiatio
① Contraction with “not”
(3) a. He shouldn’t see her.
b. *He worksn’t with her
→ Main verbs cannot contract with not.
(4) a. He may not come.
b. *He mayn’t come.
c. We shan’t be very long.
d. We won’t be very long.
→ May cannot contract with not.
Shan’t exists only in British English.
② Subject-aux inversion in yes/no questions &
tag questions
This idea can be applied to logistics as well. In the past, logistic cost has been defined in purely monetary terms. However, as not only in the EU but also in the USA and other countries became more and more aware of environmental problems ,for instance because of climate change, air pollution, noise and accidents, environmental considerations has been taken in logistics kfield. This is how Gree
2.3. Compound retrieval
When using compound word, we can separate similar images such as sky and sea. This word is hard to be separated by color or shape. Text can be a useful vehicle by searching images. For example, we typed word 'blue', 'snow', and 'tree'. Although Google image retrieval is based in keyword and idee visual search lab is based in tag, we can get result which is similar to res