30:17
STRUCTURE
2586 Views
01:56
READING COMPREHENSION &VOCABULARY
1487 Views
01:52
The Form of Irregular Verbs
1494 Views
01:59
The Tense of the Passive Voice
1614 Views
09:31
Changing from Active into Passive
1351 Views
07:20
The Form of the Passive Voice
1575 Views
03:29
What is the Passive Voice?
1603 Views
03:45
The Form of the Active Voice
1554 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2083 Views
03:20
Since vs For
1685 Views
04:50
Have or Has
1511 Views
00:49
Key Words: Present Perfect
3430 Views
09:03
The Use of the Present Perfect
1529 Views
03:08
Meaning and Form
1582 Views
02:40
Writing Formal Letters
1563 Views
03:10
Language Use
2136 Views
09:35
Parallel Structure
1712 Views
04:35
Prepositions of Instruments and Means
1534 Views
03:27
Polite Requests
1613 Views
06:30
May as a Modal of Permission and Request
1690 Views
04:11
Can as a Modal of Permission and Request
1466 Views
02:50
عناصر الاداء
1458 Views
03:45
شركة ستيرن
1020 Views
01:15
مقياس القيمة المضافة
1303 Views
02:58
مقياس الربحية
1195 Views
02:39
معايير دركر
1406 Views
03:51
مقايس الاداء
1388 Views
01:41
اتخاذ اجراءات تصحيحية
1084 Views
01:52
المرحلة الثانية من الرقابة
1177 Views
02:49
مراحل الرقابة
2561 Views