-Let me start by saying a few words about my own background.
-This morning/ afternoon I’m going to take a look at the recent developments in.....
-Hello, everyone. I'd like, first of all, to thank the organizers of this meeting for inviting me here today. 
-Good morning everyone and welcome to my presentation. First of all, let me thank you all for coming here today.
-Good morning, ladies and gentlemen. It’s an honour to have the opportunity to address such a distinguished audience.
-Hallo/Hi everyone. Thanks for coming. 
-Let me introduce myself. I’m ... from ... University in ...
-Let me start by saying just a few words about my own background. I’m a ... student of ... at ... University in ... 
-For those of you who don’t know me already, my name’s ... and I’m responsible for... 

introduce the topic of your presentation:
-I am going to talk (to you) about ...
-I am going to tell you about ...
-explain/ introduce /describe/ point out/ state
-I am here today to tell you about ...
-What I’d like to present to you today is...
-As you can see on the screen, our topic today is...
-The subject/focus/topic/title of my presentation/talk/speech is...
- In this talk, I/we would like to concentrate on...
- In my presentation I would like to report on...
- I’m here today to present...
provide an outline of your presentation:
-I have divided my presentation into ... parts. I plan to speak for about ... minutes.
-just to give you a brief overview first I will talk about ... 
-In my presentation, I’ll focus on three major issues.
-This presentation is structured as follows...
-The subject can be looked at under the following headings.....
-We can break this area down into the following fields....

-We thought it would be useful to divide our talk into three main sections.
-We have organized this talk in the following way:...
-This presentation is structured as follows:...
- This talk will cover two current theories on the topic of...
main part of talk/main body- signposting phrases:
-I would like to start now by looking at ...
- to give you an idea of what I mean
-to go back to what I was saying earlier 
-ok, let's move on and talk about
-as you all know
-I will be coming on to this later.

-I am going to start off by …

-Let’s move on the subject of …

-To return to my main point here.

-Outlining our main goals today.

-Giving you a brief overview.

-Asking you all a question

-Ok, turning for a moment to the question of …

-Let’s expand on that a little 
-Going back to what I was saying earlier.
-Ask you to remember one thing.

-Leave you with this…

summing up and ending the talk:
-I'd like to end now by summarizing the main points of my talk ...
-I’d just like to finish with the words of a famous scientist/ politician/ author.......

-Now let’s go out and create opportunities for...! 

-so, to sum up
-I’m now approaching/nearing the end of my presentation
-Well, this brings me to the end of my presentation/talk.
-That covers just about everything I wanted to say about...
-As a final point, I’d like to...
-Finally, I’d like to highlight one key issue.
-That completes my presentation.
-Let me just run over/through the key points again
-To conclude/In conclusion, I’d like to...
-In short/In a word/In a nutshell/In brief/To sum up/To summarize, it is generally/widely accepted/argued/ held/believed that...
-First we looked at... and we saw that... . Then we considered... and we argued...
-I’ll briefly summarize the main issues.
-Therefore/Thus/On this basis/Given this, it can be concluded/deduced/inferred that...
-From the table/figures/data/results/information, it can be seen/concluded/shown/estimated/calculated that...     
- in closing, i will just ...
-Summarize the main points we’ve looked at.
inviting question:
-I will be happy to answer your question now.
-If you have any questions, I am happy to answer them.
-If you don’t mind, I'd like to leave questions until the end of my talk /there will be time for a Q&A session at the end...
- If you have any questions, feel free to interrupt me at any time. 
-Please interrupt me, if there is something which needs clarifying. Otherwise, there’ll be time for discussion at the end. 
-If you have any questions you’d like to ask, I’ll be happy to answer them.
- If you don’t mind, we’ll leave questions till the end. 
- There will be time for questions after my presentation.