“So now I'll open the floor for questions.”

English Lesson: So now I'll open the floor for questions.

You've just finished giving a 15-minute presentation at an event for people to practice giving speeches in English. Now you want to give the audience a chance to ask you questions, so you say this.

So now I'll open the floor for questions.

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so now...

You can use this expression to transition between different activities when you're leading a group of people. For example, after a science teacher has finished explaining one topic he can say:

So now let's move on to Chapter 15, "Biodiversity".

If you're presenting a new piece of software at work, you can explain what it does first and then use this phrase when you want to start showing the audience how to use it:

So now I'm going to demonstrate precisely how that works. Take a look at the screen here...

open the floor for questions

To "open the floor to questions" means to allow people to ask questions in a large meeting, lecture, conference, or other group. This phrase is pretty formal, so you use it at the end of a formal speech.

"The floor" is also used to talk about who has the right to speak in a formal discussion. For example:

Senataor Meeks has the floor.

This means that Senator Meeks is allowed to talk. Other people are not allowed to talk at that time.

Chairman Kline, may I have the floor?

This is how you ask for permission to speak in a very formal discussion, like in a political committee or a company stockholders meeting.