30:17
STRUCTURE
2490 Views
01:56
READING COMPREHENSION &VOCABULARY
1394 Views
01:52
The Form of Irregular Verbs
1410 Views
01:59
The Tense of the Passive Voice
1507 Views
09:31
Changing from Active into Passive
1264 Views
07:20
The Form of the Passive Voice
1479 Views
03:29
What is the Passive Voice?
1513 Views
03:45
The Form of the Active Voice
1464 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1942 Views
03:20
Since vs For
1608 Views
04:50
Have or Has
1422 Views
00:49
Key Words: Present Perfect
3319 Views
09:03
The Use of the Present Perfect
1428 Views
03:08
Meaning and Form
1484 Views
02:40
Writing Formal Letters
1469 Views
03:10
Language Use
2050 Views
09:35
Parallel Structure
1625 Views
04:35
Prepositions of Instruments and Means
1437 Views
03:27
Polite Requests
1532 Views
06:30
May as a Modal of Permission and Request
1524 Views
04:11
Can as a Modal of Permission and Request
1333 Views
02:50
عناصر الاداء
1406 Views
03:45
شركة ستيرن
982 Views
01:15
مقياس القيمة المضافة
1271 Views
02:58
مقياس الربحية
1167 Views
02:39
معايير دركر
1338 Views
03:51
مقايس الاداء
1332 Views
01:41
اتخاذ اجراءات تصحيحية
1029 Views
01:52
المرحلة الثانية من الرقابة
1073 Views
02:49
مراحل الرقابة
2416 Views