30:17
STRUCTURE
2697 Views
01:56
READING COMPREHENSION &VOCABULARY
1577 Views
01:52
The Form of Irregular Verbs
1584 Views
01:59
The Tense of the Passive Voice
1711 Views
09:31
Changing from Active into Passive
1440 Views
07:20
The Form of the Passive Voice
1669 Views
03:29
What is the Passive Voice?
1696 Views
03:45
The Form of the Active Voice
1656 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2258 Views
03:20
Since vs For
1768 Views
04:50
Have or Has
1589 Views
00:49
Key Words: Present Perfect
3602 Views
09:03
The Use of the Present Perfect
1646 Views
03:08
Meaning and Form
1704 Views
02:40
Writing Formal Letters
1674 Views
03:10
Language Use
2242 Views
09:35
Parallel Structure
1812 Views
04:35
Prepositions of Instruments and Means
1631 Views
03:27
Polite Requests
1693 Views
06:30
May as a Modal of Permission and Request
1818 Views
04:11
Can as a Modal of Permission and Request
1645 Views
02:50
عناصر الاداء
1549 Views
03:45
شركة ستيرن
1110 Views
01:15
مقياس القيمة المضافة
1358 Views
02:58
مقياس الربحية
1260 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
1306 Views
02:49
مراحل الرقابة
2752 Views