1.  I am afraid to sleep. I have been afraid to sleep for the last few weeks. I am so tired that, finally, I do sleep, but only for a few minutes. It is not a bad dream that wakes me; it is the reality I took with me into sleep. I try to think of something else. Immediately the woman in the marketplace comes into my mind.

比较以下两个表达：

be afraid to sleep：害怕睡觉；不敢睡。比方说：睡觉做噩梦。

be afraid of sleeping：担心睡着。比方说：第二天一大早需要出差办事，赶火车等。

2. The eighteenth century, for example, produced from various sources a tendency to fix the language into patterns not always set in and grew.

not always set in and grew 是过去分词短语作定语，修饰 patterns。划线部分的意思是：把语言固定在不总是固定而是在发展的模式中。