连接词组、分句、句子。
语义划分：

a）列举、顺序

• first(ly)
• second(ly)
• third(ly)
• one
• two
• three
• for one thing
• (and) for another (thing)
• for a start
• to begin with
• to start with
• in the first place
• in the second place
• next
• then
• finally
• last
• lastly

• to conclude

  b）增补、引申

• also

• besides
• further more
• moreover
• then
• in addition
• above all

• what is more

  c）同位

• namely

• for example
• for instance
• that is

• that is to say

  d）结果

• consequently

• hense
• so
• therefore
• thus

• as a result

  e）等同

• euqally

• likewise
• similarly

• in the same way

  f）推论

• (or) else

• otherwise
• therefore
• then

• in that case

  g）换个说法

• alternatively

• rather

• in other words

  h）转折

• instead

• on the contrary
• by comparison

• (on the one hand…) on the other hand

  i）让步

• anyhow

• anyway
• however
• nevertheless
• still
• though
• yet
• in any case
• in spite of that
• after all

• all the same

  j）时间过渡

• meantime

• meanwhile

• in the meantime

  k）改变话题

• by the way

• incidentally