Formal/Neutral:
* Exist: "There exist many ways to solve this problem."
* Be present: "Present in the room were several guests."
* Have: "We have a lot of work to do."
* Find: "You will find many interesting books in this library."
* Remain: "Remaining are only a few seats."
Informal/Conversational:
* There's: "There's a spider in the corner!"
* You've got: "You've got a new message."
* We've got: "We've got a problem."
* It's: "It's a beautiful day."
* Here's: "Here's what you need to know."
Focusing on Location:
* Located: "The hotel is located near the beach."
* Situated: "The house is situated on a hill."
* Found: "The lost treasure was found in an ancient tomb."
Emphasizing Quantity:
* Many: "Many people attended the concert."
* Several: "Several students were absent."
* A few: "A few trees remain after the storm."
Emphasizing Specificity:
* Specifically: "Specifically, there are three reasons why this plan won't work."
* In particular: "In particular, there are two key differences between these products."
Remember: The best alternative will depend on the specific sentence and the desired tone and emphasis.