He is clever enough to work out the problem.
3.not only...but also...
4.It has many advantages . First, 优点1… Besides, 优点2…
5.However, every coin has two sides. It also brings us bad influences. On the one hand, 缺点1… On the other hand, 缺点2…
She not only plays well, but also writes music.
她不仅很会演奏，而且还会作曲。
Not only the students but also their teacher is enjoying the film.
不仅学生们在欣赏这部影片，他们的老师也在欣赏这部影片。
4. It is importanteasy,hard,possible,good,bad…for sb. To do sth.
还有rather…than… not…until… as well as…慢慢的补充
连词：1表层次:
first, firstly, second, secondly, third,thirdly, to begin with, to start with, what is more, last, also, and then, next, besides At first; at last; in the end… then/next/after that…
when/while/as soon as/not… until…
in addtion finally On one hand ....on the other hand， each/one coin has two sides，
2表转折;but, however, though, although, after all, in spite of，fortunately，unfortunately，at the same time…
3表递近：in addition, besides, moreover, what`s more
4因果 because, so, because of, thanks to, due to,for, since, owing to, as a resultof, hence, thus
5例证 for example, for instance, such as
6表示利弊的：be good/bad for sb.; be harmful to sb.; do harm to
sb.; …have great/much influence on sb.; sth. benefit sb.; sb benefit from sth.; affect; have an effect on sb.;