TY  - BOOK
AU  - Scheffer,Johannes
TI  - The progressive in English
T2  - North-Holland linguistic series
SN  - 0444107703
PY  - 1975///
CY  - Amsterdam
PB  - North-Holland
KW  - English language
KW  - Tense
N1  - Includes index; Bibliography: p. 363-387
ER  -