30:17
STRUCTURE
2550 Views
01:56
READING COMPREHENSION &VOCABULARY
1446 Views
01:52
The Form of Irregular Verbs
1467 Views
01:59
The Tense of the Passive Voice
1577 Views
09:31
Changing from Active into Passive
1315 Views
07:20
The Form of the Passive Voice
1536 Views
03:29
What is the Passive Voice?
1568 Views
03:45
The Form of the Active Voice
1520 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2031 Views
03:20
Since vs For
1664 Views
04:50
Have or Has
1478 Views
00:49
Key Words: Present Perfect
3382 Views
09:03
The Use of the Present Perfect
1486 Views
03:08
Meaning and Form
1540 Views
02:40
Writing Formal Letters
1525 Views
03:10
Language Use
2106 Views
09:35
Parallel Structure
1679 Views
04:35
Prepositions of Instruments and Means
1494 Views
03:27
Polite Requests
1586 Views
06:30
May as a Modal of Permission and Request
1615 Views
04:11
Can as a Modal of Permission and Request
1399 Views
02:50
عناصر الاداء
1434 Views
03:45
شركة ستيرن
1002 Views
01:15
مقياس القيمة المضافة
1291 Views
02:58
مقياس الربحية
1180 Views
02:39
معايير دركر
1379 Views
03:51
مقايس الاداء
1353 Views
01:41
اتخاذ اجراءات تصحيحية
1051 Views
01:52
المرحلة الثانية من الرقابة
1123 Views
02:49
مراحل الرقابة
2479 Views