30:17
STRUCTURE
2668 Views
01:56
READING COMPREHENSION &VOCABULARY
1557 Views
01:52
The Form of Irregular Verbs
1555 Views
01:59
The Tense of the Passive Voice
1689 Views
09:31
Changing from Active into Passive
1415 Views
07:20
The Form of the Passive Voice
1641 Views
03:29
What is the Passive Voice?
1670 Views
03:45
The Form of the Active Voice
1633 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2211 Views
03:20
Since vs For
1744 Views
04:50
Have or Has
1566 Views
00:49
Key Words: Present Perfect
3556 Views
09:03
The Use of the Present Perfect
1617 Views
03:08
Meaning and Form
1670 Views
02:40
Writing Formal Letters
1648 Views
03:10
Language Use
2216 Views
09:35
Parallel Structure
1791 Views
04:35
Prepositions of Instruments and Means
1599 Views
03:27
Polite Requests
1669 Views
06:30
May as a Modal of Permission and Request
1782 Views
04:11
Can as a Modal of Permission and Request
1605 Views
02:50
عناصر الاداء
1520 Views
03:45
شركة ستيرن
1080 Views
01:15
مقياس القيمة المضافة
1346 Views
02:58
مقياس الربحية
1247 Views
02:39
معايير دركر
1450 Views
03:51
مقايس الاداء
1450 Views
01:41
اتخاذ اجراءات تصحيحية
1133 Views
01:52
المرحلة الثانية من الرقابة
1263 Views
02:49
مراحل الرقابة
2708 Views