Women could and did play a part in this process of settlement. Iceland, for instance, was uninhabited, and a permanent population could only be established if women also made the journey there. (后一句的具体事例为前一句提供说明与解释)
People borrowed more and more money so that they could buy these shares. Because of this, the American people started to believe that share prices could only go up further. (“because of”明显的因果关系)
Astronomy is a science that deals with all the celestial bodies in the universe. Astronomy includes the study of planets and their satellites, comets and meteors, stars and interstellar matter, star systems and clusters. (后一句是对前一句celestial bodies 的进一步解释)
Previously it was believed that due to the Archaeopteryx’s (始祖鸟) underdeveloped anatomy, it would not have been able to fly. However, research by the London Natural History Museum into its brain developed and that it had good vision and a good sense of balance — all the requirements for a creature to be able to fly. (“However”转折对比)
for, thus, because, for this reason, so, therefore, as, since, consequently
4.显示顺序的信号词:
Internet speeds communication between companies, among co-workers through video-conferences, and among other individuals. First, media companies use the Internet for online news, or to broadcast audio and video, including live radio and television programs, while individuals use the Internet for communication, entertainment, finding information, buying and selling goods and services. Second, the notion of distance disappears thanks to the Internet. People also enjoy instant messaging to exchange text messages or pictures in real time, with real-time video and sound. Finally, scientists and scholars use the Internet to perform research, distribute lecture notes or course materials to students, they communicate with colleagues, and can also publish papers and articles。
抓住了这样的信号词就把握住了作者叙述的顺序,也就分清了相对独立的论据。这样的信号词包括:
first, second, third, and so on, then, after, before, next, last, afterward, finally
5.表示结论/总结的信号词:
In conclusion, I would like to say how much I have enjoyed myself today。