30:17
STRUCTURE
2498 Views
01:56
READING COMPREHENSION &VOCABULARY
1400 Views
01:52
The Form of Irregular Verbs
1416 Views
01:59
The Tense of the Passive Voice
1513 Views
09:31
Changing from Active into Passive
1270 Views
07:20
The Form of the Passive Voice
1485 Views
03:29
What is the Passive Voice?
1519 Views
03:45
The Form of the Active Voice
1471 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1949 Views
03:20
Since vs For
1615 Views
04:50
Have or Has
1430 Views
00:49
Key Words: Present Perfect
3326 Views
09:03
The Use of the Present Perfect
1434 Views
03:08
Meaning and Form
1491 Views
02:40
Writing Formal Letters
1475 Views
03:10
Language Use
2056 Views
09:35
Parallel Structure
1632 Views
04:35
Prepositions of Instruments and Means
1443 Views
03:27
Polite Requests
1538 Views
06:30
May as a Modal of Permission and Request
1532 Views
04:11
Can as a Modal of Permission and Request
1339 Views
02:50
عناصر الاداء
1409 Views
03:45
شركة ستيرن
982 Views
01:15
مقياس القيمة المضافة
1273 Views
02:58
مقياس الربحية
1168 Views
02:39
معايير دركر
1343 Views
03:51
مقايس الاداء
1332 Views
01:41
اتخاذ اجراءات تصحيحية
1029 Views
01:52
المرحلة الثانية من الرقابة
1078 Views
02:49
مراحل الرقابة
2422 Views