Prepositions of agent or instrument indicate the means by which an action is performed or the agent responsible for an action. They include prepositions like “by,” “with,” and “through,” among others. Here are examples:

1. **By:** Indicates the agent or means by which something is done.
– “The book was written by John.”
– “The cake was baked by my mom.”

2. **With:** Denotes the means or instrument used for an action.
– “She painted the picture with a brush.”
– “He cut the paper with scissors.”

3. **Through:** Indicates the means or method used to accomplish something.
– “She succeeded through hard work.”
– “He communicated with her through email.”

4. **Via:** Indicates the method or route by which something is done or achieved.
– “They communicated with us via email.”
– “She arrived in London via train.”

5. **Using:** Denotes the tool or instrument employed to accomplish a task.
– “He fixed the shelf using a hammer.”
– “She solved the problem using a calculator.”

6. **By means of:** Similar to “by,” it specifies the method or way an action is performed.
– “They navigated the city by means of a map.”
– “She solved the puzzle by means of logic.”

7. **By way of:** Indicates the route or manner through which something is achieved or obtained.
– “He reached the solution by way of experimentation.”
– “She traveled to the country by way of a scholarship.”

8. **Per:** Indicates a means, method, or unit by which something is done.
– “He drives at 80 miles per hour.”
– “The project cost $10 per item.”

9. **On:** Indicates the basis or grounds on which something happens.
– “They made the decision on advice from experts.”
– “The outcome depends on his performance.”

10. **From:** Specifies the source or origin of an action or influence.
– “She learned the news from the newspaper.”
– “The idea came from his suggestion.”

11. **By dint of:** Denotes the means or method by which something is achieved, often through effort or persistence.
– “She succeeded by dint of hard work.”
– “He accomplished the task by dint of his perseverance.”

12. **By virtue of:** Indicates the authority or basis for an action or position.
– “He got the job by virtue of his experience.”
– “She’s the leader by virtue of her seniority.”

13. **Through the use of:** Specifies the utilization of something as a means to an end.
– “The problem was solved through the use of innovative technology.”
– “They succeeded through the use of teamwork.”

14. **Via means of:** Similar to “via,” specifies the method or route through which something is accomplished.
– “The message was sent via means of a satellite.”
– “They communicated with each other via means of a translator.”

15. **Via way of:** Denotes a method or route used to reach or achieve something.
– “He traveled to Europe via way of a cruise.”
– “She found the solution via way of experimentation.”

16. **With the aid of:** Indicates the assistance or support of something in achieving an action.
– “He completed the project with the aid of his team.”
– “She managed to succeed with the aid of a mentor.”

17. **By dint of one’s efforts:** Emphasizes the result of one’s hard work or endeavor.
– “She achieved success by dint of her efforts.”
– “He improved his skills by dint of his practice.”

18. **Via means:** Specifies the method or channel used to achieve a result.
– “They received updates via means of a newsletter.”
– “She communicated her ideas via means of a presentation.”

19. **Through the assistance of:** Denotes support or help from someone or something in completing an action.
– “She accomplished the task through the assistance of her colleagues.”
– “They managed to succeed through the assistance of a mentor.”

20. **By utilization of:** Indicates the use of something as a tool or means to accomplish a task.
– “He resolved the issue by utilization of advanced technology.”
– “She completed the report by utilization of various sources.”

21. **Via method of:** Specifies the method or approach used to achieve an outcome.
– “The problem was solved via method of trial and error.”
– “They reached a consensus via method of negotiation.”

22. **By means of procedure:** Denotes the procedure or process used to achieve a specific result.
– “The error was corrected by means of a formal procedure.”
– “They resolved the conflict by means of a mediation procedure.”

23. **With the help of:** Indicates assistance or support in accomplishing a task.
– “He completed the project with the help of his colleagues.”
– “She succeeded in her venture with the help of a mentor.”

24. **By mechanism of:** Specifies the mechanism or system used to achieve a result.
– “The data was analyzed by mechanism of statistical software.”
– “The machine operates by mechanism of a complex algorithm.”

25. **By channel of:** Denotes the channel or medium through which something is accomplished.
– “They conveyed their message by channel of a broadcast.”
– “The information was disseminated by channel of a newsletter.”

These prepositions offer further clarity regarding the means, mechanisms, or channels utilized to accomplish specific actions or outcomes.

Here’s the list of prepositions of agent or instrument:

1. By
2. With
3. Through
4. Via
5. Using
6. By means of
7. By way of
8. From
9. On
10. Per
11. On
12. By dint of
13. By virtue of
14. Through the use of
15. Via means of
16. Via way of
17. With the aid of
18. By dint of one’s efforts
19. Via means
20. Through the assistance of
21. By utilization of
22. Via method of
23. By means of procedure
24. With the help of
25. By mechanism of
26. By channel of

27. By dint of effort
28. By use of
29. By method of
30. With assistance from
31. With aid from
32. By way of approach
33. By mode of
34. With support from
35. By use of means
36. Through implementation of
37. Via agency of
38. By dint of labor
39. Via methodology of
40. With contribution from
41. By pathway of
42. Via road of
43. With the use of tools
44. By intervention of
45. With cooperation from
46. By technique of
47. With collaboration from
48. Via process of
49. By strategy of
50. With endorsement from