*as
-当紧接的成份为从句时（主+谓），用as：
as you like it
as you would
as she puts it
-as good as... or better than （或用其它形容词）：
Toy Story 3 was as good as or better than the earlier Toy Story movies./
Toy Story 3 was as good as the earlier Toy Story movies, or better than they were.
*like
-(in formal English) 动 + like +名/代:
drink like a fish
- …, like + 名/代 （此时like前无须动词）
-（十四世纪后）like+从句亦可：
tell it like it is
- =resembling/such as （因此会引发歧义，不如直接说such as）
-在口语中可代替as/as if（尤其在美、澳）
