30:17
STRUCTURE
2669 Views
01:56
READING COMPREHENSION &VOCABULARY
1560 Views
01:52
The Form of Irregular Verbs
1559 Views
01:59
The Tense of the Passive Voice
1692 Views
09:31
Changing from Active into Passive
1418 Views
07:20
The Form of the Passive Voice
1644 Views
03:29
What is the Passive Voice?
1671 Views
03:45
The Form of the Active Voice
1634 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2219 Views
03:20
Since vs For
1745 Views
04:50
Have or Has
1567 Views
00:49
Key Words: Present Perfect
3563 Views
09:03
The Use of the Present Perfect
1621 Views
03:08
Meaning and Form
1672 Views
02:40
Writing Formal Letters
1650 Views
03:10
Language Use
2218 Views
09:35
Parallel Structure
1793 Views
04:35
Prepositions of Instruments and Means
1602 Views
03:27
Polite Requests
1670 Views
06:30
May as a Modal of Permission and Request
1788 Views
04:11
Can as a Modal of Permission and Request
1609 Views
02:50
عناصر الاداء
1523 Views
03:45
شركة ستيرن
1084 Views
01:15
مقياس القيمة المضافة
1346 Views
02:58
مقياس الربحية
1249 Views
02:39
معايير دركر
1451 Views
03:51
مقايس الاداء
1452 Views
01:41
اتخاذ اجراءات تصحيحية
1136 Views
01:52
المرحلة الثانية من الرقابة
1266 Views
02:49
مراحل الرقابة
2712 Views