30:17
STRUCTURE
2728 Views
01:56
READING COMPREHENSION &VOCABULARY
1601 Views
01:52
The Form of Irregular Verbs
1608 Views
01:59
The Tense of the Passive Voice
1739 Views
09:31
Changing from Active into Passive
1466 Views
07:20
The Form of the Passive Voice
1702 Views
03:29
What is the Passive Voice?
1724 Views
03:45
The Form of the Active Voice
1688 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2300 Views
03:20
Since vs For
1795 Views
04:50
Have or Has
1608 Views
00:49
Key Words: Present Perfect
3665 Views
09:03
The Use of the Present Perfect
1672 Views
03:08
Meaning and Form
1740 Views
02:40
Writing Formal Letters
1715 Views
03:10
Language Use
2266 Views
09:35
Parallel Structure
1841 Views
04:35
Prepositions of Instruments and Means
1661 Views
03:27
Polite Requests
1717 Views
06:30
May as a Modal of Permission and Request
1864 Views
04:11
Can as a Modal of Permission and Request
1697 Views
02:50
عناصر الاداء
1574 Views
03:45
شركة ستيرن
1139 Views
01:15
مقياس القيمة المضافة
1370 Views
02:58
مقياس الربحية
1272 Views
02:39
معايير دركر
1489 Views
03:51
مقايس الاداء
1486 Views
01:41
اتخاذ اجراءات تصحيحية
1166 Views
01:52
المرحلة الثانية من الرقابة
1340 Views
02:49
مراحل الرقابة
2795 Views