新人教必修4教案 Unit5 Theme parks[Grammar]
前缀大都表示空间,时间,逻辑上的关系,意思上有引申。
ab- apo- se- 这几个前缀或多或少都有“away ,off”的含义。
ab- a- abs- 在p, m, v之前作a-,在c, t之前作abs-,不能构造新词,表示“away ,apart, absence”,例如absent, avoid
se- 表示“separation”(分离),例如segregate(隔离),sedition(反叛)
ante-,fore- pre- post- pro- 这几个前缀都有“before”的意思。
ante- 表示在...前,例ante-humous(死前),ante-room(前厅)
fore- 表示时间,空间上的“在前面”,例forehead(前额),foregraound(前景),foretell(预言)
pre- 表示事先,在前,例prehistory(史前),prepayment(预支)
post- 表示时间空间上的在后。例posterity(后代),post-war(战后)
pro- 表示“代替,利于,亲于”,例pro-chancellor(代大学校长),pro-consul(代理领事)
circum- peri- 这两个前缀跟圆周有关。
circum- 表示圆周,如circumference, circumlocution, circumpolar
peri- 表示“round”,如perimeter(周长),perisphere(势力范围)
IV. Closing down by summarizing
To end the period let us summarize the making of compound words.
There are three forms of compound words:
1. the closed form, in which the words are melded together, such as firefly, secondhand, softball, childlike, crosstown, redhead, keyboard, makeup, notebook;
1. the hyphenated form, such as daughter-in-law, master-at-arms, over-the-counter, six-pack, six-year-old, mass-produced;
2. and the open form, such as post office, real estate, middle class, full moon, half sister, attorney general.





