1. turn left = turn to the left

回答如下：

(1)turn left 属于 “不及物动词+副词”结构（left 为副词，作状语修饰动词turn)

Turn left at the crossroads into Clay Lane.  

十字路口左转进克雷巷。

Turn left at the traffic lights.  

在交通信号灯处向左拐。

Go right to the end of the street, and then turn left.  

走完这条街再向左拐.

 Go up to the fork and turn left.  

走到岔口处向左拐.

(2)turn to the left 属于“不及物动词+介词短语”结构(left为名词作介词to的宾语）

 Follow the main road until it branches and then turn to the left.  

沿着大道走到分岔地方再向左拐.

 Follow this road to the bookstore, then turn to the left.  

顺着这条街到书店, 然后向左拐.

He can not remember to turn to the left or turns to the right.  

他没能记住向左拐还是向右拐.

Go down the street and turn to the left, you'll see the theatre.  

顺着街走向左拐, 你就看到剧院了.

2.our windows face south = our windows face to the south

回答如下

(1)face south 属于 “不及物动词+副词”结构（south为副词，作状语修饰动词face)

All the houses there face south.  

那里所有房子都朝南.

I do not mind that, do it face South?  

这些我倒不在乎, 是不是朝南?

 Does this apartment face south?  

这房子是否向南?

(2)face to the south 属于“不及物动词+介词短语”结构(south为名词作介词to的宾语）

The building whose windows face to the south is ou school.  

窗户朝南的那座大楼是我们学校.