30:17
STRUCTURE
2605 Views
01:56
READING COMPREHENSION &VOCABULARY
1513 Views
01:52
The Form of Irregular Verbs
1513 Views
01:59
The Tense of the Passive Voice
1641 Views
09:31
Changing from Active into Passive
1371 Views
07:20
The Form of the Passive Voice
1597 Views
03:29
What is the Passive Voice?
1629 Views
03:45
The Form of the Active Voice
1583 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2126 Views
03:20
Since vs For
1704 Views
04:50
Have or Has
1533 Views
00:49
Key Words: Present Perfect
3464 Views
09:03
The Use of the Present Perfect
1558 Views
03:08
Meaning and Form
1616 Views
02:40
Writing Formal Letters
1593 Views
03:10
Language Use
2161 Views
09:35
Parallel Structure
1735 Views
04:35
Prepositions of Instruments and Means
1552 Views
03:27
Polite Requests
1632 Views
06:30
May as a Modal of Permission and Request
1723 Views
04:11
Can as a Modal of Permission and Request
1507 Views
02:50
عناصر الاداء
1475 Views
03:45
شركة ستيرن
1035 Views
01:15
مقياس القيمة المضافة
1316 Views
02:58
مقياس الربحية
1212 Views
02:39
معايير دركر
1422 Views
03:51
مقايس الاداء
1404 Views
01:41
اتخاذ اجراءات تصحيحية
1101 Views
01:52
المرحلة الثانية من الرقابة
1197 Views
02:49
مراحل الرقابة
2589 Views