(1) Type sentences in the word box:
(2) Tap the word that you want to listen. In this example, we tapped the left of "And" so that we can listen to the second sentence. You should see a cursor (vertical blue line) at where you tapped.
Then, tap the Speak button (green). The app starts speaking from "And here is ..." instead of the beginning of the sentence.
(3) If you want to change where to start listening to (while the app is still speaking), pause the audio by tapping the Speak button. Notice that the color of the button turns to black. Then, press and hold the Speak button for a few seconds. The Speak button turns back to green. Then, repeat the above step (2).