Complex Sentence: Adverbials

*The manager keeps a close eye on the employees to ensure they do their work well.*

Which of the following statements is true:

- [x] *To ensure they do their work well* is an adverbial clause of purpose
- [ ] *To ensure they do their work well* is an adverbial clause of time
- [ ] *To ensure they do their work well* is an independent clause
- [x] You can also say *To ensure they do their work well, the manager keeps a close eye on the employees.*

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1. Correct. It gives a reason.  
2. Incorrect. It does not refer to time.  
3. Incorrect. It is a dependent or subordinate clause as you cannot use it by itself.  
4. Correct. You have to insert a comma between the two parts.
