30:17
STRUCTURE
2693 Views
01:56
READING COMPREHENSION &VOCABULARY
1574 Views
01:52
The Form of Irregular Verbs
1581 Views
01:59
The Tense of the Passive Voice
1707 Views
09:31
Changing from Active into Passive
1437 Views
07:20
The Form of the Passive Voice
1665 Views
03:29
What is the Passive Voice?
1693 Views
03:45
The Form of the Active Voice
1654 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2250 Views
03:20
Since vs For
1766 Views
04:50
Have or Has
1587 Views
00:49
Key Words: Present Perfect
3591 Views
09:03
The Use of the Present Perfect
1643 Views
03:08
Meaning and Form
1695 Views
02:40
Writing Formal Letters
1673 Views
03:10
Language Use
2237 Views
09:35
Parallel Structure
1810 Views
04:35
Prepositions of Instruments and Means
1623 Views
03:27
Polite Requests
1690 Views
06:30
May as a Modal of Permission and Request
1817 Views
04:11
Can as a Modal of Permission and Request
1631 Views
02:50
عناصر الاداء
1543 Views
03:45
شركة ستيرن
1104 Views
01:15
مقياس القيمة المضافة
1354 Views
02:58
مقياس الربحية
1255 Views
02:39
معايير دركر
1468 Views
03:51
مقايس الاداء
1467 Views
01:41
اتخاذ اجراءات تصحيحية
1146 Views
01:52
المرحلة الثانية من الرقابة
1300 Views
02:49
مراحل الرقابة
2745 Views