Put S for Subordinate Clauses, and I for Independent Clauses.
We had an enjoyable weekend is underlined
Before the sun came up is underlined
Tamara spread grain for the chickens is underlined
Steven attached the tractor's trailer is underlined
After we loaded the trailer with bales of hay is underlined
until one of them lumbered toward me is underline
1. I: Independent Clause - We had an enjoyable weekend contains a subject (We) and a verb (had). It does not contain any conjunctions that would make it necessary to include more information.
2. S: Subordinate Clause - Before the sun came up contains the subordinating conjunction "before" which transitions between the idea of the sun coming up and eating a huge breakfast.
3. I: Independent Clause - Tamara spread grain for the chickens is a complete idea. It is joined to another complete idea using a comma and a conjunction (and). The subject is Tamara and the verb is spread.
4. I: Independent Clause. Steven attached the tractor's trailer is a complete idea joined to another complete idea using a comma and a conjunction (but). Steven is the subject and attached is the verb.
5. S: Subordinate Clause - After is the subordinating conjunction that transitions from loading the trailer to hauling it to the pasture.
6. S: Subordinating clause. Until is the subordinating conjuction that transitions from not being afraid to being afraid when the cow gets closer.