30:17
STRUCTURE
2723 Views
01:56
READING COMPREHENSION &VOCABULARY
1599 Views
01:52
The Form of Irregular Verbs
1605 Views
01:59
The Tense of the Passive Voice
1735 Views
09:31
Changing from Active into Passive
1463 Views
07:20
The Form of the Passive Voice
1699 Views
03:29
What is the Passive Voice?
1722 Views
03:45
The Form of the Active Voice
1685 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2296 Views
03:20
Since vs For
1792 Views
04:50
Have or Has
1607 Views
00:49
Key Words: Present Perfect
3661 Views
09:03
The Use of the Present Perfect
1670 Views
03:08
Meaning and Form
1739 Views
02:40
Writing Formal Letters
1714 Views
03:10
Language Use
2262 Views
09:35
Parallel Structure
1839 Views
04:35
Prepositions of Instruments and Means
1660 Views
03:27
Polite Requests
1715 Views
06:30
May as a Modal of Permission and Request
1862 Views
04:11
Can as a Modal of Permission and Request
1693 Views
02:50
عناصر الاداء
1574 Views
03:45
شركة ستيرن
1136 Views
01:15
مقياس القيمة المضافة
1368 Views
02:58
مقياس الربحية
1272 Views
02:39
معايير دركر
1487 Views
03:51
مقايس الاداء
1486 Views
01:41
اتخاذ اجراءات تصحيحية
1165 Views
01:52
المرحلة الثانية من الرقابة
1338 Views
02:49
مراحل الرقابة
2792 Views