30:17
STRUCTURE
2427 Views
01:56
READING COMPREHENSION &VOCABULARY
1351 Views
01:52
The Form of Irregular Verbs
1366 Views
01:59
The Tense of the Passive Voice
1439 Views
09:31
Changing from Active into Passive
1218 Views
07:20
The Form of the Passive Voice
1422 Views
03:29
What is the Passive Voice?
1463 Views
03:45
The Form of the Active Voice
1418 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1868 Views
03:20
Since vs For
1566 Views
04:50
Have or Has
1381 Views
00:49
Key Words: Present Perfect
3253 Views
09:03
The Use of the Present Perfect
1385 Views
03:08
Meaning and Form
1430 Views
02:40
Writing Formal Letters
1418 Views
03:10
Language Use
2004 Views
09:35
Parallel Structure
1575 Views
04:35
Prepositions of Instruments and Means
1387 Views
03:27
Polite Requests
1485 Views
06:30
May as a Modal of Permission and Request
1471 Views
04:11
Can as a Modal of Permission and Request
1280 Views
02:50
عناصر الاداء
1387 Views
03:45
شركة ستيرن
952 Views
01:15
مقياس القيمة المضافة
1251 Views
02:58
مقياس الربحية
1152 Views
02:39
معايير دركر
1312 Views
03:51
مقايس الاداء
1320 Views
01:41
اتخاذ اجراءات تصحيحية
1016 Views
01:52
المرحلة الثانية من الرقابة
1003 Views
02:49
مراحل الرقابة
2357 Views