30:17
STRUCTURE
2699 Views
01:56
READING COMPREHENSION &VOCABULARY
1580 Views
01:52
The Form of Irregular Verbs
1589 Views
01:59
The Tense of the Passive Voice
1714 Views
09:31
Changing from Active into Passive
1443 Views
07:20
The Form of the Passive Voice
1671 Views
03:29
What is the Passive Voice?
1699 Views
03:45
The Form of the Active Voice
1663 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2261 Views
03:20
Since vs For
1774 Views
04:50
Have or Has
1592 Views
00:49
Key Words: Present Perfect
3609 Views
09:03
The Use of the Present Perfect
1650 Views
03:08
Meaning and Form
1711 Views
02:40
Writing Formal Letters
1678 Views
03:10
Language Use
2245 Views
09:35
Parallel Structure
1814 Views
04:35
Prepositions of Instruments and Means
1632 Views
03:27
Polite Requests
1698 Views
06:30
May as a Modal of Permission and Request
1821 Views
04:11
Can as a Modal of Permission and Request
1651 Views
02:50
عناصر الاداء
1550 Views
03:45
شركة ستيرن
1112 Views
01:15
مقياس القيمة المضافة
1361 Views
02:58
مقياس الربحية
1263 Views
02:39
معايير دركر
1472 Views
03:51
مقايس الاداء
1470 Views
01:41
اتخاذ اجراءات تصحيحية
1151 Views
01:52
المرحلة الثانية من الرقابة
1311 Views
02:49
مراحل الرقابة
2758 Views