Cake, Cathleen. <br/><br/>
Gaining ground :  intermediate grammar / 
by Cathleen Cake, Holly Deemer Rogerson 
 - Rowley, Mass. :  Newbury House Publishers,  1986. 
 - xiii, 310 p. :  ill. ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/>Tense review--Modals--Gerunds and infinitives. 
<br/><br/><label>ISBN: </label>0883773147 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Textbooks for foreign speakers.<br/>English language--Grammar--Problems, exercises, etc.