30:17
STRUCTURE
2654 Views
01:56
READING COMPREHENSION &VOCABULARY
1543 Views
01:52
The Form of Irregular Verbs
1539 Views
01:59
The Tense of the Passive Voice
1674 Views
09:31
Changing from Active into Passive
1402 Views
07:20
The Form of the Passive Voice
1626 Views
03:29
What is the Passive Voice?
1653 Views
03:45
The Form of the Active Voice
1622 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2194 Views
03:20
Since vs For
1734 Views
04:50
Have or Has
1554 Views
00:49
Key Words: Present Perfect
3520 Views
09:03
The Use of the Present Perfect
1596 Views
03:08
Meaning and Form
1652 Views
02:40
Writing Formal Letters
1633 Views
03:10
Language Use
2199 Views
09:35
Parallel Structure
1776 Views
04:35
Prepositions of Instruments and Means
1584 Views
03:27
Polite Requests
1659 Views
06:30
May as a Modal of Permission and Request
1763 Views
04:11
Can as a Modal of Permission and Request
1581 Views
02:50
عناصر الاداء
1499 Views
03:45
شركة ستيرن
1060 Views
01:15
مقياس القيمة المضافة
1332 Views
02:58
مقياس الربحية
1237 Views
02:39
معايير دركر
1442 Views
03:51
مقايس الاداء
1429 Views
01:41
اتخاذ اجراءات تصحيحية
1124 Views
01:52
المرحلة الثانية من الرقابة
1243 Views
02:49
مراحل الرقابة
2676 Views