30:17
STRUCTURE
2719 Views
01:56
READING COMPREHENSION &VOCABULARY
1597 Views
01:52
The Form of Irregular Verbs
1604 Views
01:59
The Tense of the Passive Voice
1733 Views
09:31
Changing from Active into Passive
1458 Views
07:20
The Form of the Passive Voice
1696 Views
03:29
What is the Passive Voice?
1721 Views
03:45
The Form of the Active Voice
1682 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2295 Views
03:20
Since vs For
1787 Views
04:50
Have or Has
1604 Views
00:49
Key Words: Present Perfect
3655 Views
09:03
The Use of the Present Perfect
1667 Views
03:08
Meaning and Form
1735 Views
02:40
Writing Formal Letters
1713 Views
03:10
Language Use
2260 Views
09:35
Parallel Structure
1836 Views
04:35
Prepositions of Instruments and Means
1657 Views
03:27
Polite Requests
1713 Views
06:30
May as a Modal of Permission and Request
1861 Views
04:11
Can as a Modal of Permission and Request
1687 Views
02:50
عناصر الاداء
1570 Views
03:45
شركة ستيرن
1132 Views
01:15
مقياس القيمة المضافة
1367 Views
02:58
مقياس الربحية
1270 Views
02:39
معايير دركر
1482 Views
03:51
مقايس الاداء
1481 Views
01:41
اتخاذ اجراءات تصحيحية
1158 Views
01:52
المرحلة الثانية من الرقابة
1336 Views
02:49
مراحل الرقابة
2786 Views