I was able to find out something in order to help you. I’m not a native speaker, but I think we could hunt down your question together. May be somebody help us later.
According to the Webster’s grammar guide:
A simple sentence consists of one and only one independent clause ( a group of words that has a subject and a predicate). And an independent clause does not depend upon anything else for its meaning. It expresses a complete thought. But some sentence have compound subject or predicate).
For example: John joined the Navy. (simple subject and predicate). John and Fred joined the Marines. (compound subject). Mary sang and played at the concert. (compound predicate). Mary and Jane sang and played at the concert. (compound subject and predicate). Yet a compound subject does not mean two subjects. It means the one subject is made up of two or more nouns or pronous. And compoud predicate is made up of two preditaces.
A compound sentence is a sentence that contains two or more independent clauses. When you put two independent clauses or two simple sentences together to form longer sentence, you have a compound sentence.
The independent clauses of a compound sentence may be connected in one of three ways:
By using a conjunction, a semicolon without conjunction, a transitional word( yet, at last, still, in fact etc.)
A complex sentence is a sentence that consists of one independent clause and one or more subordinate clauses. A subordinate clause depends upon the independent clause for its meaning.
In the complex sentence is often used a subordinate conjunction. It is used to show that the clause which it introduces is a subordinate clause, and not a main clause. (We listened to the radio because we wanted to hear the news.)
So let see
Alexander Graham Bell invented the telephone. –Simple
“To kill two birds with one stone” is a proverb. –simple ?
Someone apparently has taken my watch from this desk. -Simple
Pauline gave Ricky a mobile phone for his twenty-first birthday. –Compound or Complex ?
She jogs every evening, yet( transitional word) she grows fatter. –Compound
You must start using materials that are not included in the course book ( subordinate clause). Complex
My sister is normally a cheerful person, but (coordinate conjunction) she seemed rather unhappy that day. -Compound
The lady whose husband is an engineer, talks loudly. –Complex (subordinate clause).
She decided to resign from her present job because (subordinate conjunction)she wanted to be with her family. –Complex
The police arrested the men who had robbed the bank two months ago. (subordinate clause) -Complex
Maggie frequently calls as(subordinate conjunction) she wants to keep in touch. –Complex
The storm just knocked down that hut in two minutes. -??? simple
In 1818, Mary Shelley wrote a famous book (that)called “Frankenstein” –simple or complex ?
Ghazali felt happy for his aunt when ( relative adverb) he read her letter. -complex
Ramasamy, the current world champion, is training in a secret location. -Complex
I went to town yesterday and had a look around the shops. -Compound ? Simple ( one subject and a compound predicate in a simple sentence.)
Jamilah hid the hen, and Budiman tried unsuccessfully to hide the cow. -Compound
The naughty boys played football in the rain so ( they are now down with flu. -Compound ? Complex.
You can take the train or the bus to the library. –Compound ? Simple (one subject and compound predicate)
Monarch butterflies, which migrate to Mexico each year (subordinate clause), are guided by instinct. –Complex