30:17
STRUCTURE
2638 Views
01:56
READING COMPREHENSION &VOCABULARY
1524 Views
01:52
The Form of Irregular Verbs
1527 Views
01:59
The Tense of the Passive Voice
1655 Views
09:31
Changing from Active into Passive
1381 Views
07:20
The Form of the Passive Voice
1610 Views
03:29
What is the Passive Voice?
1638 Views
03:45
The Form of the Active Voice
1602 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2149 Views
03:20
Since vs For
1712 Views
04:50
Have or Has
1540 Views
00:49
Key Words: Present Perfect
3479 Views
09:03
The Use of the Present Perfect
1572 Views
03:08
Meaning and Form
1628 Views
02:40
Writing Formal Letters
1607 Views
03:10
Language Use
2176 Views
09:35
Parallel Structure
1748 Views
04:35
Prepositions of Instruments and Means
1560 Views
03:27
Polite Requests
1638 Views
06:30
May as a Modal of Permission and Request
1732 Views
04:11
Can as a Modal of Permission and Request
1532 Views
02:50
عناصر الاداء
1480 Views
03:45
شركة ستيرن
1042 Views
01:15
مقياس القيمة المضافة
1323 Views
02:58
مقياس الربحية
1217 Views
02:39
معايير دركر
1426 Views
03:51
مقايس الاداء
1410 Views
01:41
اتخاذ اجراءات تصحيحية
1106 Views
01:52
المرحلة الثانية من الرقابة
1211 Views
02:49
مراحل الرقابة
2610 Views