A.
to...+ 動詞原形的不定式，用於表述以下幾種語境：
做某事的意圖；為何做某事；有某物；需要某物；為何存在；
B.
人/ 事/ 物+ to+ 動詞原形(+to/ with);
例如: money/ time/ chance/ opportunity/ energy/ courage等+ todo something, eg:
They gave us money to buyfood.
C.
for和to的區別：
for+ 名詞, eg: We stopped for petrol.
to+動詞, eg: We stopped to get petrol.
固定句式：
'for somebody to do something', eg:There weren't any chairs for us to sit on, so we sat on the floor.for+ -ing/ to... 表示某事的常用用途, eg:I went into the kitchen to wash the dishes.'What... for?' 詢問目的, eg:What is this switch for?
D.
So that
用於以下幾種用途：
否定的目的( so that... won't/ wouldn't), eg:I hurried so that I wouldn't be late.與can和could連用, eg:She's learning English so that she can study in Canda.that可被省略, eg:
I hurried so( that) I wouldn't be late.
Exercises
Key