原句：Some of their base camps were far larger (over 1,000 square meters) than any of those belonging to earlier periods, and they may have lived in some of these camps for half the year or even more.

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對于這個句子的分析，首先，這是由并列連詞and并列的前后兩個句子：

Some of their base camps were far larger (over 1,000 square meters) than any of those belonging to earlier periods,

and

they may have lived in some of these camps for half the year or even more.

?

前面這個句子，從句型的角度來講，這是一個主系表句型，

主語：Some of their base camps

系動詞：were

表語：far larger (over 1,000 square meters)

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句子中的than，從詞類劃分的角度來講，這是一個并列連詞，相當于and，只不過語義不同而已，在這個句子中，并列連詞than并列的是句子的兩個主語，也就是

Some of their base camps 和 any of those belonging to earlier periods,

?

Some of their base camps ?than ?any of those belonging to earlier periods,

從結(jié)構(gòu)的角度來講，完全相當于

Some of their base camps ?and ?any of those belonging to earlier periods,

?

在我們漢語表達中，兩個比較對象是要放在一起，（1）XX（2）比XX（3）更…，也就是按照下面這種信息排列方式：

（1）Some of their base camps（2）than any of those belonging to earlier periods（3）were far larger (over 1,000 square meters).

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但是，在英語中，這種表示比較的句型，要先把句子表達完整，然后再把比較的對象放在句尾表達出來，也就是原句的樣子，（1）XX（2）更…（3）比XX：

（1）Some of their base camps （2）were far larger (over 1,000 square meters) （3）than any of those belonging to earlier periods.

?

后面這個句子，從句型的角度來講，這是一個主動介賓的句型，

主語：they

動詞：may have lived

介詞：in

賓語：some of these camps

狀語：for half the year or even more.