30:17
STRUCTURE
2643 Views
01:56
READING COMPREHENSION &VOCABULARY
1532 Views
01:52
The Form of Irregular Verbs
1530 Views
01:59
The Tense of the Passive Voice
1666 Views
09:31
Changing from Active into Passive
1393 Views
07:20
The Form of the Passive Voice
1617 Views
03:29
What is the Passive Voice?
1647 Views
03:45
The Form of the Active Voice
1610 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2176 Views
03:20
Since vs For
1723 Views
04:50
Have or Has
1547 Views
00:49
Key Words: Present Perfect
3495 Views
09:03
The Use of the Present Perfect
1581 Views
03:08
Meaning and Form
1643 Views
02:40
Writing Formal Letters
1619 Views
03:10
Language Use
2185 Views
09:35
Parallel Structure
1764 Views
04:35
Prepositions of Instruments and Means
1568 Views
03:27
Polite Requests
1648 Views
06:30
May as a Modal of Permission and Request
1743 Views
04:11
Can as a Modal of Permission and Request
1558 Views
02:50
عناصر الاداء
1486 Views
03:45
شركة ستيرن
1050 Views
01:15
مقياس القيمة المضافة
1329 Views
02:58
مقياس الربحية
1232 Views
02:39
معايير دركر
1432 Views
03:51
مقايس الاداء
1423 Views
01:41
اتخاذ اجراءات تصحيحية
1116 Views
01:52
المرحلة الثانية من الرقابة
1226 Views
02:49
مراحل الرقابة
2643 Views