30:17
STRUCTURE
2704 Views
01:56
READING COMPREHENSION &VOCABULARY
1585 Views
01:52
The Form of Irregular Verbs
1592 Views
01:59
The Tense of the Passive Voice
1719 Views
09:31
Changing from Active into Passive
1448 Views
07:20
The Form of the Passive Voice
1676 Views
03:29
What is the Passive Voice?
1704 Views
03:45
The Form of the Active Voice
1666 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2268 Views
03:20
Since vs For
1778 Views
04:50
Have or Has
1596 Views
00:49
Key Words: Present Perfect
3616 Views
09:03
The Use of the Present Perfect
1652 Views
03:08
Meaning and Form
1715 Views
02:40
Writing Formal Letters
1684 Views
03:10
Language Use
2249 Views
09:35
Parallel Structure
1819 Views
04:35
Prepositions of Instruments and Means
1636 Views
03:27
Polite Requests
1706 Views
06:30
May as a Modal of Permission and Request
1828 Views
04:11
Can as a Modal of Permission and Request
1655 Views
02:50
عناصر الاداء
1556 Views
03:45
شركة ستيرن
1120 Views
01:15
مقياس القيمة المضافة
1362 Views
02:58
مقياس الربحية
1264 Views
02:39
معايير دركر
1474 Views
03:51
مقايس الاداء
1471 Views
01:41
اتخاذ اجراءات تصحيحية
1152 Views
01:52
المرحلة الثانية من الرقابة
1320 Views
02:49
مراحل الرقابة
2763 Views