排 = to line up, to align
The two-character version for 'to line
up, to queue' is:
排队 = pai(2)dui(4) = to queue, to line up
When you stand in a line and others want
to overtake you, you can say:
请排队,妤吗? = Qing(3)
pai(2)dui(4), hao(3) ma(-)? = Please stand in line, OK?
There is a general trend in the Chinese
language to combine two morphemes into words, as this greatly enhances clarity.
Many of these combinations of two charactes are bysyllabic new words. However,
single-character words retain their usability if they occur in set
two-character phrases. An example is:
请排妤! = Qing(3) pai(2) hao(3)! = Please queue
In daily conversations, Chinese native
speakers would normally not use 排 as a single-morpheme word. But in
the combination with 好, this is common usage.
并排 = bing(4)pai(2) = side by side, alongside
两个人并排坐. = Liang(3) ge(4)
ren(2) bing(4)pai(2) zuo(4). = Two people sit side by side.