30:17
STRUCTURE
2673 Views
01:56
READING COMPREHENSION &VOCABULARY
1563 Views
01:52
The Form of Irregular Verbs
1566 Views
01:59
The Tense of the Passive Voice
1696 Views
09:31
Changing from Active into Passive
1423 Views
07:20
The Form of the Passive Voice
1649 Views
03:29
What is the Passive Voice?
1677 Views
03:45
The Form of the Active Voice
1639 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2229 Views
03:20
Since vs For
1751 Views
04:50
Have or Has
1574 Views
00:49
Key Words: Present Perfect
3571 Views
09:03
The Use of the Present Perfect
1626 Views
03:08
Meaning and Form
1678 Views
02:40
Writing Formal Letters
1657 Views
03:10
Language Use
2222 Views
09:35
Parallel Structure
1801 Views
04:35
Prepositions of Instruments and Means
1605 Views
03:27
Polite Requests
1677 Views
06:30
May as a Modal of Permission and Request
1802 Views
04:11
Can as a Modal of Permission and Request
1614 Views
02:50
عناصر الاداء
1529 Views
03:45
شركة ستيرن
1090 Views
01:15
مقياس القيمة المضافة
1350 Views
02:58
مقياس الربحية
1251 Views
02:39
معايير دركر
1457 Views
03:51
مقايس الاداء
1457 Views
01:41
اتخاذ اجراءات تصحيحية
1136 Views
01:52
المرحلة الثانية من الرقابة
1278 Views
02:49
مراحل الرقابة
2723 Views