30:17
STRUCTURE
2697 Views
01:56
READING COMPREHENSION &VOCABULARY
1578 Views
01:52
The Form of Irregular Verbs
1588 Views
01:59
The Tense of the Passive Voice
1711 Views
09:31
Changing from Active into Passive
1442 Views
07:20
The Form of the Passive Voice
1670 Views
03:29
What is the Passive Voice?
1698 Views
03:45
The Form of the Active Voice
1659 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2259 Views
03:20
Since vs For
1769 Views
04:50
Have or Has
1591 Views
00:49
Key Words: Present Perfect
3608 Views
09:03
The Use of the Present Perfect
1648 Views
03:08
Meaning and Form
1708 Views
02:40
Writing Formal Letters
1676 Views
03:10
Language Use
2244 Views
09:35
Parallel Structure
1812 Views
04:35
Prepositions of Instruments and Means
1631 Views
03:27
Polite Requests
1696 Views
06:30
May as a Modal of Permission and Request
1821 Views
04:11
Can as a Modal of Permission and Request
1647 Views
02:50
عناصر الاداء
1549 Views
03:45
شركة ستيرن
1111 Views
01:15
مقياس القيمة المضافة
1361 Views
02:58
مقياس الربحية
1262 Views
02:39
معايير دركر
1471 Views
03:51
مقايس الاداء
1469 Views
01:41
اتخاذ اجراءات تصحيحية
1148 Views
01:52
المرحلة الثانية من الرقابة
1309 Views
02:49
مراحل الرقابة
2755 Views