30:17
STRUCTURE
2464 Views
01:56
READING COMPREHENSION &VOCABULARY
1372 Views
01:52
The Form of Irregular Verbs
1388 Views
01:59
The Tense of the Passive Voice
1484 Views
09:31
Changing from Active into Passive
1241 Views
07:20
The Form of the Passive Voice
1452 Views
03:29
What is the Passive Voice?
1488 Views
03:45
The Form of the Active Voice
1440 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1915 Views
03:20
Since vs For
1585 Views
04:50
Have or Has
1400 Views
00:49
Key Words: Present Perfect
3294 Views
09:03
The Use of the Present Perfect
1406 Views
03:08
Meaning and Form
1459 Views
02:40
Writing Formal Letters
1442 Views
03:10
Language Use
2028 Views
09:35
Parallel Structure
1601 Views
04:35
Prepositions of Instruments and Means
1415 Views
03:27
Polite Requests
1509 Views
06:30
May as a Modal of Permission and Request
1500 Views
04:11
Can as a Modal of Permission and Request
1308 Views
02:50
عناصر الاداء
1400 Views
03:45
شركة ستيرن
979 Views
01:15
مقياس القيمة المضافة
1265 Views
02:58
مقياس الربحية
1166 Views
02:39
معايير دركر
1327 Views
03:51
مقايس الاداء
1330 Views
01:41
اتخاذ اجراءات تصحيحية
1027 Views
01:52
المرحلة الثانية من الرقابة
1049 Views
02:49
مراحل الرقابة
2398 Views