Formal:
* Presently: This emphasizes the immediate time. Example: "Presently, the meeting is scheduled to start."
* Currently: This highlights the ongoing state. Example: "Currently, the economy is facing challenges."
* At this time: This is a more general phrase for "now." Example: "At this time, there are no reports of any disruptions."
* At present: Similar to "currently," this emphasizes the present state. Example: "At present, we are not accepting new clients."
Informal:
* Right now: This is a casual way to say "now." Example: "Right now, I am feeling very tired."
* At the moment: This implies a temporary state. Example: "At the moment, I am working on a new project."
* These days: This emphasizes the current period of time. Example: "These days, it's hard to find a good job."
Other:
* Immediately: This emphasizes a very short time frame. Example: "I need to leave immediately."
* Instantly: This implies an even shorter time frame than "immediately." Example: "The lights went out instantly."
The best word to use will depend on the context of your sentence and the specific meaning you want to convey.