30:17
STRUCTURE
2603 Views
01:56
READING COMPREHENSION &VOCABULARY
1510 Views
01:52
The Form of Irregular Verbs
1512 Views
01:59
The Tense of the Passive Voice
1639 Views
09:31
Changing from Active into Passive
1370 Views
07:20
The Form of the Passive Voice
1596 Views
03:29
What is the Passive Voice?
1628 Views
03:45
The Form of the Active Voice
1583 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2124 Views
03:20
Since vs For
1703 Views
04:50
Have or Has
1531 Views
00:49
Key Words: Present Perfect
3463 Views
09:03
The Use of the Present Perfect
1557 Views
03:08
Meaning and Form
1614 Views
02:40
Writing Formal Letters
1591 Views
03:10
Language Use
2160 Views
09:35
Parallel Structure
1733 Views
04:35
Prepositions of Instruments and Means
1551 Views
03:27
Polite Requests
1630 Views
06:30
May as a Modal of Permission and Request
1721 Views
04:11
Can as a Modal of Permission and Request
1502 Views
02:50
عناصر الاداء
1475 Views
03:45
شركة ستيرن
1035 Views
01:15
مقياس القيمة المضافة
1315 Views
02:58
مقياس الربحية
1210 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
1196 Views
02:49
مراحل الرقابة
2586 Views