30:17
STRUCTURE
2648 Views
01:56
READING COMPREHENSION &VOCABULARY
1536 Views
01:52
The Form of Irregular Verbs
1533 Views
01:59
The Tense of the Passive Voice
1668 Views
09:31
Changing from Active into Passive
1396 Views
07:20
The Form of the Passive Voice
1620 Views
03:29
What is the Passive Voice?
1649 Views
03:45
The Form of the Active Voice
1613 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2183 Views
03:20
Since vs For
1726 Views
04:50
Have or Has
1549 Views
00:49
Key Words: Present Perfect
3505 Views
09:03
The Use of the Present Perfect
1588 Views
03:08
Meaning and Form
1645 Views
02:40
Writing Formal Letters
1627 Views
03:10
Language Use
2189 Views
09:35
Parallel Structure
1771 Views
04:35
Prepositions of Instruments and Means
1574 Views
03:27
Polite Requests
1653 Views
06:30
May as a Modal of Permission and Request
1752 Views
04:11
Can as a Modal of Permission and Request
1572 Views
02:50
عناصر الاداء
1492 Views
03:45
شركة ستيرن
1057 Views
01:15
مقياس القيمة المضافة
1329 Views
02:58
مقياس الربحية
1233 Views
02:39
معايير دركر
1433 Views
03:51
مقايس الاداء
1426 Views
01:41
اتخاذ اجراءات تصحيحية
1119 Views
01:52
المرحلة الثانية من الرقابة
1231 Views
02:49
مراحل الرقابة
2655 Views