The S-Rule；NP+Inflp(indicate tense and) +VP

Specifier+head +complement

eg.A boy found or will find the evidence.

转化：助动词移位（倒装），CP,move infl to complementizer.

Do insertion:

SS,DP.eg,It contains all the units for interpreting the meaning of the sentence;that of sentence as is pronouced or written.

Wh-movement:The old lady suddenly left(word category).

A story about a sentimental girl.Specifier +N bar

The deep structure of the sentence: the girl he often quarrels with whom majors in English.