30:17
STRUCTURE
2700 Views
01:56
READING COMPREHENSION &VOCABULARY
1584 Views
01:52
The Form of Irregular Verbs
1591 Views
01:59
The Tense of the Passive Voice
1716 Views
09:31
Changing from Active into Passive
1443 Views
07:20
The Form of the Passive Voice
1673 Views
03:29
What is the Passive Voice?
1701 Views
03:45
The Form of the Active Voice
1665 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2265 Views
03:20
Since vs For
1776 Views
04:50
Have or Has
1593 Views
00:49
Key Words: Present Perfect
3613 Views
09:03
The Use of the Present Perfect
1651 Views
03:08
Meaning and Form
1714 Views
02:40
Writing Formal Letters
1680 Views
03:10
Language Use
2245 Views
09:35
Parallel Structure
1818 Views
04:35
Prepositions of Instruments and Means
1634 Views
03:27
Polite Requests
1701 Views
06:30
May as a Modal of Permission and Request
1825 Views
04:11
Can as a Modal of Permission and Request
1654 Views
02:50
عناصر الاداء
1555 Views
03:45
شركة ستيرن
1115 Views
01:15
مقياس القيمة المضافة
1361 Views
02:58
مقياس الربحية
1264 Views
02:39
معايير دركر
1473 Views
03:51
مقايس الاداء
1471 Views
01:41
اتخاذ اجراءات تصحيحية
1152 Views
01:52
المرحلة الثانية من الرقابة
1315 Views
02:49
مراحل الرقابة
2759 Views