30:17
STRUCTURE
2656 Views
01:56
READING COMPREHENSION &VOCABULARY
1545 Views
01:52
The Form of Irregular Verbs
1548 Views
01:59
The Tense of the Passive Voice
1677 Views
09:31
Changing from Active into Passive
1410 Views
07:20
The Form of the Passive Voice
1631 Views
03:29
What is the Passive Voice?
1659 Views
03:45
The Form of the Active Voice
1626 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2201 Views
03:20
Since vs For
1737 Views
04:50
Have or Has
1559 Views
00:49
Key Words: Present Perfect
3540 Views
09:03
The Use of the Present Perfect
1609 Views
03:08
Meaning and Form
1661 Views
02:40
Writing Formal Letters
1638 Views
03:10
Language Use
2206 Views
09:35
Parallel Structure
1781 Views
04:35
Prepositions of Instruments and Means
1588 Views
03:27
Polite Requests
1664 Views
06:30
May as a Modal of Permission and Request
1772 Views
04:11
Can as a Modal of Permission and Request
1597 Views
02:50
عناصر الاداء
1510 Views
03:45
شركة ستيرن
1069 Views
01:15
مقياس القيمة المضافة
1338 Views
02:58
مقياس الربحية
1243 Views
02:39
معايير دركر
1444 Views
03:51
مقايس الاداء
1435 Views
01:41
اتخاذ اجراءات تصحيحية
1127 Views
01:52
المرحلة الثانية من الرقابة
1255 Views
02:49
مراحل الرقابة
2689 Views