30:17
STRUCTURE
2650 Views
01:56
READING COMPREHENSION &VOCABULARY
1539 Views
01:52
The Form of Irregular Verbs
1535 Views
01:59
The Tense of the Passive Voice
1670 Views
09:31
Changing from Active into Passive
1398 Views
07:20
The Form of the Passive Voice
1622 Views
03:29
What is the Passive Voice?
1651 Views
03:45
The Form of the Active Voice
1614 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2186 Views
03:20
Since vs For
1728 Views
04:50
Have or Has
1551 Views
00:49
Key Words: Present Perfect
3512 Views
09:03
The Use of the Present Perfect
1591 Views
03:08
Meaning and Form
1647 Views
02:40
Writing Formal Letters
1629 Views
03:10
Language Use
2192 Views
09:35
Parallel Structure
1772 Views
04:35
Prepositions of Instruments and Means
1580 Views
03:27
Polite Requests
1655 Views
06:30
May as a Modal of Permission and Request
1757 Views
04:11
Can as a Modal of Permission and Request
1574 Views
02:50
عناصر الاداء
1494 Views
03:45
شركة ستيرن
1058 Views
01:15
مقياس القيمة المضافة
1331 Views
02:58
مقياس الربحية
1234 Views
02:39
معايير دركر
1438 Views
03:51
مقايس الاداء
1428 Views
01:41
اتخاذ اجراءات تصحيحية
1122 Views
01:52
المرحلة الثانية من الرقابة
1235 Views
02:49
مراحل الرقابة
2664 Views