30:17
STRUCTURE
2658 Views
01:56
READING COMPREHENSION &VOCABULARY
1549 Views
01:52
The Form of Irregular Verbs
1551 Views
01:59
The Tense of the Passive Voice
1681 Views
09:31
Changing from Active into Passive
1413 Views
07:20
The Form of the Passive Voice
1635 Views
03:29
What is the Passive Voice?
1664 Views
03:45
The Form of the Active Voice
1627 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2204 Views
03:20
Since vs For
1739 Views
04:50
Have or Has
1560 Views
00:49
Key Words: Present Perfect
3546 Views
09:03
The Use of the Present Perfect
1611 Views
03:08
Meaning and Form
1664 Views
02:40
Writing Formal Letters
1640 Views
03:10
Language Use
2209 Views
09:35
Parallel Structure
1784 Views
04:35
Prepositions of Instruments and Means
1593 Views
03:27
Polite Requests
1666 Views
06:30
May as a Modal of Permission and Request
1772 Views
04:11
Can as a Modal of Permission and Request
1598 Views
02:50
عناصر الاداء
1513 Views
03:45
شركة ستيرن
1072 Views
01:15
مقياس القيمة المضافة
1339 Views
02:58
مقياس الربحية
1243 Views
02:39
معايير دركر
1445 Views
03:51
مقايس الاداء
1437 Views
01:41
اتخاذ اجراءات تصحيحية
1130 Views
01:52
المرحلة الثانية من الرقابة
1257 Views
02:49
مراحل الرقابة
2697 Views