Questions 21–28: identify the conjunctions in the following sentences. label each one as coordinating, correlative, or subordinating. 21. i left my car at the garage, but i will pick it up tonight. 22. andrews and mcmillan were the first two engineers at the company. 23. i will take our visitors to the theater, provided that you buy the tickets. 24. commuting may get bad because either rain or snow is expected tonight. 25. the barkers will be if their dinner is a success. 6. we won’t have the manuals on time unless we get them to the printer tomorrow morning. 26. both typewriters and word processors are needed in many offices. 27. richard will come early since he has to set up his projection equipment. 28. rose will attend the conference, although she will arrive late.

The answers are as follows: 
21. The conjunction is 'BUT'. It is a COORDINATING conjunction.
22. The conjunction is 'WERE'. It is a COORDINATING conjunction.
23. The conjunction is ' PROVIDED THAT. It is a SUBORDINATING conjunction.
24. The conjunction is EITHER, OR. It is a correlative conjunction.
25. The conjunction in the sentence is 'UNLESS'. It is a SUBORDINATING CONJUNCTION.
26. The conjunction is 'AND'. It is a COORDINATING CONJUNCTION.
27. The conjunction in the sentence is 'SINCE. It is a SUBORDINATING conjunction. 
28. The conjunction is 'ALTHOUGH'. It is a SUBORDINATING conjunction.
 
Conjunctions are words that are used in sentences to link two words, phrases or clauses together. Conjunctions are divided into three major classes, which are coordinating, subordinating and correlative. The coordinating conjunctions are used to joint two words, clauses or phrases together. The subordinating conjunctions are used to connect two groups of words by making one of the group to be subordinate to the other one. The correlative conjunctions are used in pairs to join elements that are equal in value.

4actions not really sure but that seems the most logical