两年后重新上路，为了宝宝加油↖(^ω^)↗

bestshanshan

—if you have a modifier of the form (subordinating conjunction) + (participle), then, no matter where that modifier is placed, it should describe the subject of the clause to which it is attached.

—although exhausted from a long day of work, james still played football with his son.

—james, although exhausted from a long day of work, still played football with his son.

—james still played football with his son, although exhausted from a long day of work.

—when we have “when + past participle” (and nothing else in between), then we’re talking about some action done by the subject of the main clause touching that “when” modifier

—I ate mangoes with my sister when hungry.

—I ate mangoes on the beach when hungry.

—I ate mangoes on the beach when (I was) hungry.

—"even though" MUST be followed by a clause.
"although", however, can be followed by an adjective or adjective phrase: james, although bigger than many of the other players, is one of the fastest men on the team.

bestshanshan

Due to   caused by   because of

  

—Use ‘due to’ only to modify nouns.

—Usage of ‘due to’ is correct, if the sentence makes sense when ‘due to’ is replaced with ’caused by’.

—Use ‘because of’ to modify verbs.

—‘Due to’ & ‘because of’ are not interchangeable.

bestshanshan

充分必要条件指示词
充分必要条件指示词



1.introduce a sufficient condition: if/when/whenever/every/all/any/people who/in order to/to



2.introduce a necessary condition: then/only/only if/must/require/no,none(在句子开头)



3.unless equation: unless/except/until/without(其后面部分变成必要条件，其它加NOT变充分条件)



4.特例：the only way to achieve success is to work hard.  achieve success(充分条件)



only a professional consultant can solve the organization’s problems. a professional consultant(必要条件)



no citizen can be denied the right to vote. denied the right to vote(充分条件). no citizen(必要条件)