It is SO important to be able to write the common words quickly and without hesitation. To join them together, however, is quite simply the best basic practice you can undertake because they will always be there - we cannot escape them - the common words in phrases we hear all the while....I will be, you will be, we shall have, I will have the, and so on.
From Beginners Series 3.
You can find Quizlet cards for many more simple word groupings at https://quizlet.com/749659883/simple-teeline-word-groupings-flash-cards/.
You can find a growing collection of Word Groupings posts on the LLTT Blog.