30:17
STRUCTURE
2557 Views
01:56
READING COMPREHENSION &VOCABULARY
1447 Views
01:52
The Form of Irregular Verbs
1469 Views
01:59
The Tense of the Passive Voice
1580 Views
09:31
Changing from Active into Passive
1316 Views
07:20
The Form of the Passive Voice
1537 Views
03:29
What is the Passive Voice?
1569 Views
03:45
The Form of the Active Voice
1522 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2039 Views
03:20
Since vs For
1668 Views
04:50
Have or Has
1483 Views
00:49
Key Words: Present Perfect
3386 Views
09:03
The Use of the Present Perfect
1490 Views
03:08
Meaning and Form
1543 Views
02:40
Writing Formal Letters
1526 Views
03:10
Language Use
2110 Views
09:35
Parallel Structure
1683 Views
04:35
Prepositions of Instruments and Means
1495 Views
03:27
Polite Requests
1591 Views
06:30
May as a Modal of Permission and Request
1621 Views
04:11
Can as a Modal of Permission and Request
1408 Views
02:50
عناصر الاداء
1437 Views
03:45
شركة ستيرن
1006 Views
01:15
مقياس القيمة المضافة
1292 Views
02:58
مقياس الربحية
1182 Views
02:39
معايير دركر
1382 Views
03:51
مقايس الاداء
1357 Views
01:41
اتخاذ اجراءات تصحيحية
1054 Views
01:52
المرحلة الثانية من الرقابة
1124 Views
02:49
مراحل الرقابة
2485 Views