These are the 50 most used function words, and they constitute a very important percentage of spoken English. The most important thing is that when you select the word in the box next to it, you see its possible pronunciations. And in the expressions that appear you will observe examples of use, that if you learn them to produce, you are already speaking English.
Study and record them using Praat
Select the function word to get examples of use. Making a selection in "Select to hear it" you listen to them. And through the buttons you can watch videos from YouGlish.com that contain them. Remember the facilities that it offers.