Issues with the Sentence:
* Missing Verb: The main clause ("you contentedly rented from friends years") lacks a verb after "rented." It should be "you contentedly rented from friends for years."
* Awkward Phrase: "From friends years" is not grammatically correct. It should be "from your friends for years."
Corrected Sentence:
Before your house was built, you contentedly rented from your friends for years.
Diagramming:
Here's how we can diagram the sentence:
```
________________________
| |
Before your house was built,
| |
| ________
| | |
you contentedly rented
| |
from your friends
| |
for years
```
Explanation:
* Main Clause: "You contentedly rented from your friends for years" is the main clause.
* Subordinate Clause: "Before your house was built" is a subordinate clause acting as an adverbial modifier, telling us *when* the renting occurred.
* Prepositional Phrases: "from your friends" and "for years" are prepositional phrases modifying "rented."
Note: This diagram focuses on the grammatical structure of the corrected sentence. The awkwardness of the original phrase is addressed by revising the sentence.