That is not actually a complete sentence. It is a dependent clause because it cannot stand alone. If you were to take off the subordinating conjunction "when," it could stand alone and would a sentence.
The simple subject in that dependent clause is field.
:)
After the rain turned the field to mud, my feet got wet and I had to return home.
Sentence is misspelled first off. Your sentence: I like to run with my dog in the field he's got a pretty coat? This is a run on sentence. You should put a period after field. "I like to run with my dog in the field." This is a complete sentence. In the next part you add: "He's got a pretty coat." This is another subject and so should be included in another sentence. The subject in the first sentence is running with the dog, in the second sentence the subject is the dog's pretty coat.
The subject of the sentence is cow (cow was grazing).
"In the field wildflowers grow.""In" is the preposition because it is the word that indicates to a the location of the "wildflowers", the subject in the sentence.
A linking verb acts as an equals sign. The object of the verb is a form of the subject (Mary is my sister. Mary=sister), or the subject becomes the object (Mary's feet got wet. (feet->wet).
A wet field
it is to wet when there is puddles in the field
Who, or what has been raining; it. I believe that the word "it" is the subject of this sentence.
The sentence Why are your shoes wet is a question, an interrogative.
A linking verb acts as an equals sign:the object of the verb is a different form of the subject (Mary is my sister. Mary=sister)orthe subject becomes the object (Mary's feet got wet. feet->wet).
"Singing" is the gerund because it is being used as a noun. The sentence is not talking about a certain person who is singing in the ran, but the act of singing in the rain. Furthermore, the verb in the sentence is "can", and the subject always comes before the verb, so "singing" is the subject. Verbs, when they are used as subjects, are gerunds.