Scheffer, Johannes. <br/><br/>
The progressive in English / 
Johannes Scheffer. 
 - Amsterdam :  North-Holland Pub. ;  1975. 
 - xii, 397 p. : 
 - North-Holland linguistic series ; .
<br/><br/><label>ISBN: </label>0444107703 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language-Tense.--
<br/><br/><label>Dewey Class. No.: </label>425  / Pr