30:17
STRUCTURE
2654 Views
01:56
READING COMPREHENSION &VOCABULARY
1543 Views
01:52
The Form of Irregular Verbs
1543 Views
01:59
The Tense of the Passive Voice
1675 Views
09:31
Changing from Active into Passive
1403 Views
07:20
The Form of the Passive Voice
1627 Views
03:29
What is the Passive Voice?
1653 Views
03:45
The Form of the Active Voice
1623 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2196 Views
03:20
Since vs For
1735 Views
04:50
Have or Has
1555 Views
00:49
Key Words: Present Perfect
3522 Views
09:03
The Use of the Present Perfect
1598 Views
03:08
Meaning and Form
1656 Views
02:40
Writing Formal Letters
1635 Views
03:10
Language Use
2199 Views
09:35
Parallel Structure
1776 Views
04:35
Prepositions of Instruments and Means
1586 Views
03:27
Polite Requests
1661 Views
06:30
May as a Modal of Permission and Request
1764 Views
04:11
Can as a Modal of Permission and Request
1585 Views
02:50
عناصر الاداء
1501 Views
03:45
شركة ستيرن
1062 Views
01:15
مقياس القيمة المضافة
1335 Views
02:58
مقياس الربحية
1240 Views
02:39
معايير دركر
1443 Views
03:51
مقايس الاداء
1431 Views
01:41
اتخاذ اجراءات تصحيحية
1125 Views
01:52
المرحلة الثانية من الرقابة
1249 Views
02:49
مراحل الرقابة
2678 Views