In my classes now I have thought to follow a sequence, which seems to turn out ok.
First I make my students say and answer with just words.
The second step is saying full sentences.
And the third, to speak for longer or to hold a conversation.
As I said, it has worked in my classes. Now they are speaking for somewhat long, even for 3 minutes. In 3 minutes you can say so many things; it’s a nice length of time. / Photo from: www utsandiego com