30:17
STRUCTURE
2418 Views
01:56
READING COMPREHENSION &VOCABULARY
1348 Views
01:52
The Form of Irregular Verbs
1361 Views
01:59
The Tense of the Passive Voice
1433 Views
09:31
Changing from Active into Passive
1213 Views
07:20
The Form of the Passive Voice
1417 Views
03:29
What is the Passive Voice?
1459 Views
03:45
The Form of the Active Voice
1413 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1861 Views
03:20
Since vs For
1562 Views
04:50
Have or Has
1375 Views
00:49
Key Words: Present Perfect
3249 Views
09:03
The Use of the Present Perfect
1380 Views
03:08
Meaning and Form
1425 Views
02:40
Writing Formal Letters
1413 Views
03:10
Language Use
2001 Views
09:35
Parallel Structure
1571 Views
04:35
Prepositions of Instruments and Means
1381 Views
03:27
Polite Requests
1477 Views
06:30
May as a Modal of Permission and Request
1463 Views
04:11
Can as a Modal of Permission and Request
1274 Views
02:50
عناصر الاداء
1383 Views
03:45
شركة ستيرن
946 Views
01:15
مقياس القيمة المضافة
1241 Views
02:58
مقياس الربحية
1147 Views
02:39
معايير دركر
1306 Views
03:51
مقايس الاداء
1318 Views
01:41
اتخاذ اجراءات تصحيحية
1014 Views
01:52
المرحلة الثانية من الرقابة
997 Views
02:49
مراحل الرقابة
2351 Views